Down below here is a completely different way of doing SBR for Global 1940

Strategic Bomber in air-to-air combat SBR:
Attack 0
Bombard IC or AB or NB damage: 1D6**+3**

Fighter in air-to-air combat SBR:
Attack 1
Defend 1

Tactical Bomber in air-to-air combat SBR:
Attack 1
Bombard AB or NB damage: 1D6

IC’s AAA: @1 against each Strategic Bomber
Naval Base or Air Base: @1 against each Strategic Bomber or Tactical bomber

G40 SBR HRules with StB A0 and Fg A1 D1 : damage 1D6+3

1 Strategic Bomber doing SBR against no interceptor

AAA roll = odds casualties

5/6 StB survived * 6.5 IPCs = +5.417 IPCs
1/6 StB killed *12 IPCs = -2 IPCs

Sum: + 5.417 - 2 = +3.417 IPCs damage/SBR run

1 Strategic Bomber Att 0 doing SBR against 1 interceptor Def 1

Interceptor Fg roll/ AAA roll = odds casualties

1/66/6 = 6/36 1 StB killed by Fg
5/61/6 = 5/36 1 StB killed by AAA
5/6*5/6 = 25/36 No casualty at all.

Results:
Bombard on IC 25/36* ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 4.514 IPCs
StB killed 11/36 *-12 IPCs = - 3.667 IPCs
Sum: + 4.514 - 3.667 = + 0.847 IPC. damage/SBR run

1 Strategic Bomber Att 0 doing SBR against 2 interceptors Def 1

Interceptors Fgs roll/ AAA roll = odds casualties

11/366/6 = 66/216 1 StB killed by Fg
25/361/6 = 25/216 1 StB killed by AAA
25/36*5/6 = 125/216 No casualty at all.

Results:
Bombard on IC 125/216* ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 3.762 IPCs
StB killed 91/216 *-12 IPCs = - 5.056 IPCs
Sum: + 3.762 - 5.056 = - 1.294 IPC. damage/SBR run

1 Fighter Att 1 and 1 Strategic Bomber Att 0 doing SBR against 2 interceptors Def 1

Fighter roll/interceptors Fgs roll/ AAA roll = odds casualties

1/61/366/6 = 6/1296 1 Fg and 1 StB killed by Fgs vs 1 Fg
1/610/361/6= 10/1296 1 Fg killed by Fg and 1 StB killed by AAA vs 1 Fg
1/610/365/6= 50/1296 1 Fg killed by Fg vs 1 Fg
1/625/361/6 = 25/1296 1 StB killed by AAA vs 1 Fg
1/625/365/6 = 125/1296 No casualty vs 1 Fg

5/61/366/6 = 30/1296 1 Fg and 1 StB killed by Fg vs no casualty
5/610/361/6 = 50/1296 1 Fg killed by Fg and 1 StB killed by AAA vs no casualty
5/610/365/6 = 250/1296 1 Fg killed by Fg vs no casualty
5/625/361/6 = 125/1296 1 StB killed by AAA vs no casualty
5/625/365/6 = 625/1296 no casualty at all

Results:
Bombard on IC: 1050/1296 * ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 5.266 IPCs
Killing 1 Fg: 216/1296 +10 IPCs = + 1.667 IPCs
Fg killed: 300/1296-10 IPCs = - 2.315 IPCs
StB killed: 150/1296*-12 IPCs = - 1.389IPCs
StB & Fg killed: 96/1296*-22 IPCs = - 1.630 IPCs

Sum: + 6.933 - 5.334 = + 1.599 IPC damage/SBR run

1 Fighter Att 1 and 1 Strategic Bomber Att 0 doing SBR against 1 interceptor Def 1

Fighter roll/interceptor Fg roll/ AAA roll = odds casualties

1/61/61/6= 1/216 1 Fg killed by Fg and 1 StB killed by AAA vs 1 Fg
1/61/65/6= 5/216 1 Fg killed by Fg vs 1 Fg
1/65/61/6 = 5/216 1 StB killed by AAA vs 1 Fg
1/65/65/6 = 25/216 No casualty vs 1 Fg

5/61/61/6 = 5/216 1 Fg killed by Fg and 1 StB killed by AAA vs no casualty
5/61/65/6 = 25/216 1 Fg killed by Fg vs no casualty
5/65/61/6 = 25/216 1 StB killed by AAA vs no casualty
5/65/65/6 = 125/216 no casualty at all

Results:
Bombard on IC: 180/216 * ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 5.417 IPCs
Killing 1 Fg: 36/216 +10 IPCs = + 1.667 IPCs
Fg killed:30/216-10 IPCs = - 1.389 IPCs
StB killed: 30/216*-12 IPCs = - 1.667 IPCs
StB & Fg killed: 6/216*-22 IPCs = - 0.611 IPC

Sum: + 7.084 - 3.667 = + 3.417 IPC damage/SBR run

2 Strategic Bombers Att 0 doing SBR against 2 interceptors Def 1

Interceptor Fgs roll/ AAA roll = odds casualties

1/3636/36= 36/1296 2 StBs killed by Fgs
10/366/36 = 60/1296 1 StB killed by Fg and 1 StB killed by AAA
10/6*30/36= 300/1296 1 StB killed by Fg

25/361/36 = 25/1296 2 StBs killed by AAA
25/3610/36 = 250/1296 1 StB killed by AAA
25/36*25/36 = 625/1296 No casualty at all.

Results:
2x Bombard on IC 625/1296* ((2+4)+(12+4) IPCs)/2= +13 IPCs) = +6.269 IPCs
1x Bombard on IC 550/1296* ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 2.758 IPCs
2 StBs killed 121/1296*-24 IPCs = - 2.241 IPCs
1 StB killed 550/1296*-12 IPCs = - 5.093 IPCs
Sum: + 9.027 - 7.334 = + 1.693 IPCs damage/SBR run

2 Strategic Bombers Att 0 doing SBR against 1 interceptor Def 1

Interceptor Fg roll/ AAA roll = odds casualties

1/66/36 = 6/216 1 StB killed by Fg and 1 StB killed by AAA
1/630/36= 30/216 1 StB killed by Fg
5/61/36 = 5/216 2 StBs killed by AAA
5/610/36 = 50/216 1 StB killed by AAA
5/6*25/36 = 125/216 No casualty at all.

Results:
2x Bombard on IC 125/216* ((2+4)+(12+4) IPCs)/2= +13 IPCs) = +7.523 IPCs
1x Bombard on IC 80/216* ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 2.407 IPCs
2 StBs killed 11/216*-24 IPCs = - 1.222 IPC
1 StB killed 80/216*-12 IPCs = - 4.444 IPCs
Sum: + 9.930 - 5.666 = + 4.264 IPCs damage/SBR run

Summary: StB A0 damage: 1D6**+3**, Fg A1 D1
1 Strategic Bomber doing SBR against no interceptor
Sum: + 5.417 - 2 = +3.417 IPCs damage/SBR run

1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Sum: + 4.514 - 3.667 = + 0.847 IPC. damage/SBR run

1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Sum: + 3.762 - 5.056 = - 1.294 IPC. damage/SBR run

1 Fighter A1 and 1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Sum: + 6.933 - 5.334 = + 1.599 IPC damage/SBR run

2 Strategic Bombers A0 doing SBR against 2 interceptors D1
Sum: + 9.027 - 7.334 = + 1.693 IPCs damage/SBR run

1 Fighter A1 and 1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Sum: + 7.084 - 3.667 = + 3.417 IPC damage/SBR run

2 Strategic Bombers A0 doing SBR against 1 interceptor D1
Sum: + 9.930 - 5.666 = + 4.264 IPCs damage/SBR run

G1940 OOB SBR:
1 StB doing SBR without interceptor
Sum: +4.583 - 2 = +2.583 IPCs damage/SBR run

1 StB A1 against 1 Fg D1 damage: 1D6+2
Sum: + 5.486 - 3.667 = + 1.819 IPC damage/SBR run

1 StB A1 doing SBR against 2 intercepting Fgs D1
Sum: + 4.85 - 5.056 = - 0.206 IPCs damage/SBR run

1 StB & 1 Fg A1 doing SBR against 2 intercepting Fgs D1 damage: 1D6+2
Sum: +7.775 - 5.33 = + 2.445 IPCs damage/SBR run

2 StBs A1 doing SBR against 2 intercepting Fgs D1 damage: 1D6+2
Sum: +10.973 - 7.334 = + 3.639 IPCs damage/SBR run

1 StB & 1 Fg A1 doing SBR against 1 intercepting Fg D1
Sum: + 7.639 - 3.667 = + 3.972 IPCs damage/SBR run

2 StBs A1 doing SBR against 1 intercepting Fg D1
Sum: +11.459 - 5.666 = + 5.793 IPCs damage/SBR run

Down below here is a small variant from the above SBR HR for Global 1940
That is my preferred ones, since it is nearer OOB odds.
In this case, both attacking Fighters and Tactical Bombers have a small First Strike advantage over defending Fighter.
However, Strategic Bombers are still defenseless against interceptors.

In this variant, it should be assumed that Tactical bombers can do escorting mission besides Strategic bombers, even when there is no Air Base or Naval Base.

Strategic Bomber in air-to-air combat SBR:
Attack 0
Bombard IC or AB or NB damage: 1D6**+3**
It is a higher rate of damage to compensate for the 0 attack factor.

Fighter in air-to-air combat SBR:
Attack 1 First Strike
Defend 1

Tactical Bomber in air-to-air combat SBR:
Attack 1 First Strike
Bombard AB or NB damage: 1D6

IC’s AAA: @1 against each Strategic Bomber
Naval Base or Air Base: @1 against each Strategic Bomber or Tactical bomber

G40 SBR HRules with StB A0 and Fg A1 First Strike D1 : damage 1D6+3

1 Strategic Bomber doing SBR against no interceptor

AAA roll = odds casualties

5/6 StB survived * 6.5 IPCs = +5.417 IPCs
1/6 StB killed *12 IPCs = -2 IPCs

Sum: + 5.417 - 2 = +3.417 IPCs damage/SBR

1 Strategic Bomber Att 0 doing SBR against 1 interceptor Def 1

Interceptor Fg roll/ AAA roll = odds casualties

1/66/6 = 6/36 1 StB killed by Fg
5/61/6 = 5/36 1 StB killed by AAA
5/6*5/6 = 25/36 No casualty at all.

Results:
Bombard on IC 25/36* ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 4.514 IPCs
StB killed 11/36 *-12 IPCs = - 3.667 IPCs
Sum: + 4.514 - 3.667 = + 0.847 IPC. damage/SBR

1 Strategic Bomber Att 0 doing SBR against 2 interceptors Def 1

Interceptors Fgs roll/ AAA roll = odds casualties

11/366/6 = 66/216 1 StB killed by Fg
25/361/6 = 25/216 1 StB killed by AAA
25/36*5/6 = 125/216 No casualty at all.

Results:
Bombard on IC 125/216* ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 3.762 IPCs
StB killed 91/216 *-12 IPCs = - 5.056 IPCs
Sum: + 3.762 - 5.056 = - 1.294 IPC. damage/SBR

1 Fighter Attack 1 First Strike and 1 Strategic Bomber Att 0 doing SBR against 2 interceptors Def 1

Fighter roll/interceptors Fgs roll/ AAA roll = odds casualties

1/66/361/6= 6/1296 1 Fg killed by Fg and 1 StB killed by AAA vs 1 Fg
1/66/365/6= 30/1296 1 Fg killed by Fg vs 1 Fg
1/630/361/6 = 30/1296 1 StB killed by AAA vs 1 Fg
1/630/365/6 = 150/1296 No casualty vs 1 Fg

5/61/366/6 = 30/1296 1 Fg and 1 StB killed by Fg vs no casualty
5/610/361/6 = 50/1296 1 Fg killed by Fg and 1 StB killed by AAA vs no casualty
5/610/365/6 = 250/1296 1 Fg killed by Fg vs no casualty
5/625/361/6 = 125/1296 1 StB killed by AAA vs no casualty
5/625/365/6 = 625/1296 no casualty at all

Results:
Bombard on IC: 1055/1296 * ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 5.291 IPCs
Killing 1 Fg: 216/1296 +10 IPCs = + 1.667 IPCs
Fg killed: 280/1296-10 IPCs = - 2.160 IPCs
StB killed: 155/1296*-12 IPCs = - 1.435 IPCs
StB & Fg killed: 86/1296*-22 IPCs = - 1.460 IPCs

Sum: + 6.958 - 5.055 = + 1.903 IPC damage/SBR

1 Fighter Att 1 First Strike and 1 Strategic Bomber Att 0 doing SBR against 1 interceptor Def 1

Fighter roll/interceptor Fg roll/ AAA roll = odds casualties

1/66/61/6 = 6/216 1 StB killed by AAA vs 1 Fg
1/66/65/6 = 30/216 No casualty vs 1 Fg

5/61/61/6 = 5/216 1 Fg killed by Fg and 1 StB killed by AAA vs no casualty
5/61/65/6 = 25/216 1 Fg killed by Fg vs no casualty
5/65/61/6 = 25/216 1 StB killed by AAA vs no casualty
5/65/65/6 = 125/216 no casualty at all

Results:
Bombard on IC: 180/216 * ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 5.417 IPCs
Killing 1 Fg: 36/216 +10 IPCs = + 1.667 IPCs
Fg killed: 25/216-10 IPCs = - 1.157 IPCs
StB killed: 31/216*-12 IPCs = - 1.722 IPCs
StB & Fg killed: 5/216*-22 IPCs = - 0.509 IPC

Sum: + 7.084 - 3.388 = + 3.696 IPC damage/SBR

2 Strategic Bombers Att 0 doing SBR against 2 interceptors Def 1

Interceptor Fgs roll/ AAA roll = odds casualties

1/3636/36= 36/1296 2 StBs killed by Fgs
10/366/36 = 60/1296 1 StB killed by Fg and 1 StB killed by AAA
10/6*30/36= 300/1296 1 StB killed by Fg

25/361/36 = 25/1296 2 StBs killed by AAA
25/3610/36 = 250/1296 1 StB killed by AAA
25/36*25/36 = 625/1296 No casualty at all.

Results:
2x Bombard on IC 625/1296* ((2+4)+(12+4) IPCs)/2= +13 IPCs) = +6.269 IPCs
1x Bombard on IC 550/1296* ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 2.758 IPCs
2 StBs killed 121/1296*-24 IPCs = - 2.241 IPCs
1 StB killed 550/1296*-12 IPCs = - 5.093 IPCs
Sum: + 9.027 - 7.334 = + 1.693 IPCs damage/SBR

2 Strategic Bombers Att 0 doing SBR against 1 interceptor Def 1

Interceptor Fg roll/ AAA roll = odds casualties

1/66/36 = 6/216 1 StB killed by Fg and 1 StB killed by AAA
1/630/36= 30/216 1 StB killed by Fg
5/61/36 = 5/216 2 StBs killed by AAA
5/610/36 = 50/216 1 StB killed by AAA
5/6*25/36 = 125/216 No casualty at all.

Results:
2x Bombard on IC 125/216* ((2+4)+(12+4) IPCs)/2= +13 IPCs) = +7.523 IPCs
1x Bombard on IC 80/216* ((1+2)+(6+2) IPCs)/2= +6.5 IPCs) = + 2.407 IPCs
2 StBs killed 11/216*-24 IPCs = - 1.222 IPC
1 StB killed 80/216*-12 IPCs = - 4.444 IPCs
Sum: + 9.930 - 5.666 = + 4.264 IPCs damage/SBR

Summary: StB A0 Damage: 1D6**+3**, Fg A1_fs_D1
1 Strategic Bomber doing SBR against no interceptor
Sum: + 5.417 - 2 = +3.417 IPCs damage/SBR
OOB G40: +4.583 - 2 = +2.583 IPCs damage/SBR

1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Sum: + 4.514 - 3.667 = + 0.847 IPC. damage/SBR
OOB G40: + 5.486 - 3.667 = + 1.819 IPC damage/SBR

1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Sum: + 3.762 - 5.056 = - 1.294 IPC. damage/SBR
OOB G40: + 4.85 - 5.056 = - 0.206 IPCs damage/SBR

1 Fighter A1 First Strike and 1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Sum: + 6.958 - 5.055 = + 1.903 IPC damage/SBR run
Fg A1_fs_D1 Bomber first: + 5.554 - 5.055 = + 0.499 IPC damage/SBR
StB A1 D6+3, Fg A1 D1 Bomber first: +7.094 - 5.333 = + 1.761 IPCs damage/StB
Fg A1 D1 regular: + 6.933 - 5.333 = + 1.600 IPC damage/SBR
OOB G40: +7.775 - 5.333 = + 2.442 IPCs damage/SBR

2 Strategic Bombers A0 doing SBR against 2 interceptors D1
Sum: + 9.027 - 7.334 = + 1.693 IPCs damage/SBR
OOB G40: +10.973 - 7.334 = + 3.639 IPCs damage/SBR

1 Fighter A1 First Strike and 1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Sum: + 7.084 - 3.388 = + 3.696 IPC damage/SBR
Fg A1_fs_D1 Bomber first: + 6.331 - 3.389 = + 2.942 IPC damage/SBR
StB A1 D6+3, Fg A1 D1 Bomber first: +7.570 - 3.667 = + 3.903 IPCs damage/StB
Fg A1 D1 regular: + 7.084 - 3.667 = + 3.417 IPC damage/SBR
OOB G40: + 7.639 - 3.667 = + 3.972 IPCs damage/SBR

2 Strategic Bombers A0 doing SBR against 1 interceptor D1
Sum: + 9.930 - 5.666 = + 4.264 IPCs damage/SBR
OOB G40: +11.459 - 5.666 = + 5.793 IPCs damage/SBR

2 Strategic Bombers doing SBR against no interceptor
Sum: + 10.834 - 4 = +6.834 IPCs damage/SBR
OOB G40: +9.167 - 4 = +5.167 IPCs damage/SBR

To get an easy comparison point with OOB G40 SBR:

G1940 OOB SBR:
1 StB doing SBR without interceptor
Sum: +4.583 - 2 = +2.583 IPCs damage/SBR

1 StB A1 against 1 Fg D1 damage: 1D6+2
Sum: + 5.486 - 3.667 = + 1.819 IPC damage/SBR

1 StB A1 doing SBR against 2 intercepting Fgs D1
Sum: + 4.85 - 5.056 = - 0.206 IPCs damage/SBR

1 StB & 1 Fg A1 doing SBR against 2 intercepting Fgs D1 damage: 1D6+2
Sum: +7.775 - 5.33 = + 2.445 IPCs damage/SBR

2 StBs A1 doing SBR against 2 intercepting Fgs D1 damage: 1D6+2
Sum: +10.973 - 7.334 = + 3.639 IPCs damage/SBR

1 StB & 1 Fg A1 doing SBR against 1 intercepting Fg D1
Sum: + 7.639 - 3.667 = + 3.972 IPCs damage/SBR

2 StBs A1 doing SBR against 1 intercepting Fg D1
Sum: +11.459 - 5.666 = + 5.793 IPCs damage/SBR

Down below here is another small variant from the above SBR HR for Global 1940
That is my preferred, because it is the nearest G40 OOB odds we can get without going crazy on heavy bombardment.
In this case (as the last one above), both attacking Fighters and Tactical Bombers still have a small First Strike advantage over defending Fighter.
However, Strategic Bombers are still defenseless against interceptors.

In this variant, it should be assumed that Tactical bombers can do escorting mission besides Strategic bombers, even when there is no Air Base or Naval Base.

Strategic Bomber in air-to-air combat SBR:
Attack 0
Bombard IC or AB or NB damage: 2D6
It is a higher rate of damage to compensate for the 0 attack factor.

Fighter in air-to-air combat SBR:
Attack 1 First Strike
Defend 1

Tactical Bomber in air-to-air combat SBR:
Attack 1 First Strike
Bombard AB or NB damage: 1D6

IC’s AAA: @1 against each Strategic Bomber
Naval Base or Air Base: @1 against each Strategic Bomber or Tactical bomber

G40 SBR HRules with StB A0 and Fg A1 First Strike D1 : damage 2D6

1 Strategic Bomber doing SBR against no interceptor

AAA roll = odds casualties

5/6 StB survived * (2+12= 14/2= 7 IPCs) = +5.833 IPCs
1/6 StB killed *12 IPCs = -2 IPCs

Sum: + 5.833 - 2 = +3.833 IPCs damage/SBR run

1 Strategic Bomber Att 0 doing SBR against 1 interceptor Def 1

Interceptor Fg roll/ AAA roll = odds casualties

1/66/6 = 6/36 1 StB killed by Fg
5/61/6 = 5/36 1 StB killed by AAA
5/6*5/6 = 25/36 No casualty at all.

Results:
Bombard on IC 25/36* ((1+2)+(6+2) IPCs)/2= +7 IPCs) = + 4.861 IPCs
StB killed 11/36 *-12 IPCs = - 3.667 IPCs
Sum: + 4.861 - 3.667 = + 1.194 IPC damage/SBR run

1 Strategic Bomber Att 0 doing SBR against 2 interceptors Def 1

Interceptors Fgs roll/ AAA roll = odds casualties

11/366/6 = 66/216 1 StB killed by Fg
25/361/6 = 25/216 1 StB killed by AAA
25/36*5/6 = 125/216 No casualty at all.

Results:
Bombard on IC 125/216* ((1+2)+(6+2) IPCs)/2= +7 IPCs) = + 4.051 IPCs
StB killed 91/216 *-12 IPCs = - 5.056 IPCs
Sum: + 4.051 - 5.056 = - 1.005 IPC damage/SBR run

1 Fighter Attack 1 First Strike and 1 Strategic Bomber Att 0 doing SBR against 2 interceptors Def 1

Fighter roll/interceptors Fgs roll/ AAA roll = odds casualties

1/66/361/6= 6/1296 1 Fg killed by Fg and 1 StB killed by AAA vs 1 Fg
1/66/365/6= 30/1296 1 Fg killed by Fg vs 1 Fg
1/630/361/6 = 30/1296 1 StB killed by AAA vs 1 Fg
1/630/365/6 = 150/1296 No casualty vs 1 Fg

5/61/366/6 = 30/1296 1 Fg and 1 StB killed by Fg vs no casualty
5/610/361/6 = 50/1296 1 Fg killed by Fg and 1 StB killed by AAA vs no casualty
5/610/365/6 = 250/1296 1 Fg killed by Fg vs no casualty
5/625/361/6 = 125/1296 1 StB killed by AAA vs no casualty
5/625/365/6 = 625/1296 no casualty at all

Results:
Bombard on IC: 1055/1296 * ((1+2)+(6+2) IPCs)/2= +7 IPCs) = + 5.698 IPCs
Killing 1 Fg: 216/1296 +10 IPCs = + 1.667 IPCs
Fg killed: 280/1296-10 IPCs = - 2.160 IPCs
StB killed: 155/1296*-12 IPCs = - 1.435 IPCs
StB & Fg killed: 86/1296*-22 IPCs = - 1.460 IPCs

Sum: + 7.365 - 5.055 = + 2.310 IPC damage/SBR run

1 Fighter Att 1 First Strike and 1 Strategic Bomber Att 0 doing SBR against 1 interceptor Def 1

Fighter roll/interceptor Fg roll/ AAA roll = odds casualties

1/66/61/6 = 6/216 1 StB killed by AAA vs 1 Fg
1/66/65/6 = 30/216 No casualty vs 1 Fg

5/61/61/6 = 5/216 1 Fg killed by Fg and 1 StB killed by AAA vs no casualty
5/61/65/6 = 25/216 1 Fg killed by Fg vs no casualty
5/65/61/6 = 25/216 1 StB killed by AAA vs no casualty
5/65/65/6 = 125/216 no casualty at all

Results:
Bombard on IC: 180/216 * ((1+2)+(6+2) IPCs)/2= +7 IPCs) = + 5.833 IPCs
Killing 1 Fg: 36/216 +10 IPCs = + 1.667 IPCs
Fg killed: 25/216-10 IPCs = - 1.157 IPCs
StB killed: 31/216*-12 IPCs = - 1.722 IPCs
StB & Fg killed: 5/216*-22 IPCs = - 0.509 IPC

Sum: + 7.500 - 3.388 = + 4.112 IPC damage/SBR run

2 Strategic Bombers Att 0 doing SBR against 2 interceptors Def 1

Interceptor Fgs roll/ AAA roll = odds casualties

1/3636/36= 36/1296 2 StBs killed by Fgs
10/366/36 = 60/1296 1 StB killed by Fg and 1 StB killed by AAA
10/6*30/36= 300/1296 1 StB killed by Fg

25/361/36 = 25/1296 2 StBs killed by AAA
25/3610/36 = 250/1296 1 StB killed by AAA
25/36*25/36 = 625/1296 No casualty at all.

Results:
2x Bombard on IC 625/1296* ((2+4)+(12+4) IPCs)/2= +14 IPCs) = +6.752 IPCs
1x Bombard on IC 550/1296* ((1+2)+(6+2) IPCs)/2= +7 IPCs) = + 2.971 IPCs
2 StBs killed 121/1296*-24 IPCs = - 2.241 IPCs
1 StB killed 550/1296*-12 IPCs = - 5.093 IPCs
Sum: + 9.722 - 7.334 = + 2.389 IPCs damage/SBR run

2 Strategic Bombers Att 0 doing SBR against 1 interceptor Def 1

Interceptor Fg roll/ AAA roll = odds casualties

1/66/36 = 6/216 1 StB killed by Fg and 1 StB killed by AAA
1/630/36= 30/216 1 StB killed by Fg
5/61/36 = 5/216 2 StBs killed by AAA
5/610/36 = 50/216 1 StB killed by AAA
5/6*25/36 = 125/216 No casualty at all.

Results:
2x Bombard on IC 125/216* ((2+4)+(12+4) IPCs)/2= +14 IPCs) = +8.102 IPCs
1x Bombard on IC 80/216* ((1+2)+(6+2) IPCs)/2= +7 IPCs) = + 2.593 IPCs
2 StBs killed 11/216*-24 IPCs = - 1.222 IPC
1 StB killed 80/216*-12 IPCs = - 4.444 IPCs
Sum: + 10.695 - 5.666 = + 5.029 IPCs damage/SBR run

2 Strategic Bombers doing SBR against no interceptor
AAA roll = odds casualties
2* 5/6 StB survived * (2+12= 14/2= 7 IPCs) = +11.667 IPCs
2* 1/6 StB killed *12 IPCs = -4 IPCs

Sum: + 11.667 - 4 = +7.667 IPCs damage/SBR run

Summary:
StB A0 and Fg A1 First Strike D1 : damage 2D6

1 Strategic Bomber doing SBR against no interceptor
Sum: + 5.833 - 2 = +3.833 IPCs damage/SBR run

1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Sum: + 4.861 - 3.667 = + 1.194 IPC damage/SBR run

1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Sum: + 4.051 - 5.056 = - 1.005 IPC damage/SBR run

1 Fighter A1 First Strike and 1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Sum: + 7.365 - 5.055 = + 2.310 IPC damage/SBR run
If bomber first target: + 5.853 - 5.055 = + 0.798 IPC damage/SBR run

2 Strategic Bombers A0 doing SBR against 2 interceptors D1
Sum: + 9.722 - 7.334 = + 2.389 IPCs damage/SBR run

1 Fighter A1 First Strike and 1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Sum: + 7.500 - 3.388 = + 4.112 IPC damage/SBR run
If bomber first target: + 6.690 - 3.389 = + 3.301 IPC damage/SBR run

2 Strategic Bombers A0 doing SBR against 1 interceptor D1
Sum: + 10.695 - 5.666 = + 5.029 IPCs damage/SBR run

2 Strategic Bombers doing SBR against no interceptor
Sum: + 11.667 - 4 = +7.667 IPCs damage/SBR run

G1940 OOB SBR:
1 StB doing SBR without interceptor
Sum: +4.583 - 2 = +2.583 IPCs damage/SBR run

1 StB A1 against 1 Fg D1 damage: 1D6+2
Sum: + 5.486 - 3.667 = + 1.819 IPC damage/SBR run

1 StB A1 doing SBR against 2 intercepting Fgs D1
Sum: + 4.85 - 5.056 = - 0.206 IPCs damage/SBR run

1 StB & 1 Fg A1 doing SBR against 2 intercepting Fgs D1 damage: 1D6+2
Sum: +7.775 - 5.33 = + 2.445 IPCs damage/SBR run

2 StBs A1 doing SBR against 2 intercepting Fgs D1 damage: 1D6+2
Sum: +10.973 - 7.334 = + 3.639 IPCs damage/SBR run

1 StB & 1 Fg A1 doing SBR against 1 intercepting Fg D1
Sum: + 7.639 - 3.667 = + 3.972 IPCs damage/SBR run

2 StBs A1 doing SBR against 1 intercepting Fg D1
Sum: +11.459 - 5.666 = + 5.793 IPCs damage/SBR run

2 StBs doing SBR without interceptor
Sum: +9.167 - 4 = +5.167 IPCs damage/SBR run

Here is the OOB ratio, of all SBR for reference:
@Baron:

To give everyone an opportunity to make his own mind about which SBR rules is his prefered one, and their impact and odds, here is a complete summary of all the calc results about various SBR rules with different combination of units:

G1940 OOB SBR:
1 StB doing SBR without interceptor
Sum: +4.583 - 2 = +2.583 IPCs damage/SBR

1 StB A1 against 1 Fg D1 damage: 1D6+2
Sum: + 5.486 - 3.667 = +1.819 IPC damage/SBR

1 StB A1 doing SBR against 2 intercepting Fgs D1
Sum: + 4.85 - 5.056 = -0.206 IPCs damage/SBR

1 StB & 1 Fg A1 doing SBR against 2 intercepting Fgs D1 damage: 1D6+2
Sum: +7.775 - 5.33 = +2.445 IPCs damage/SBR

2 StBs A1 doing SBR against 2 intercepting Fgs D1 damage: 1D6+2
Sum: +10.973 - 7.334 = +3.639 IPCs damage/SBR

1 StB & 1 Fg A1 doing SBR against 1 intercepting Fg D1
Sum: + 7.639 - 3.667 = +3.972 IPCs damage/SBR

2 StBs A1 doing SBR against 1 intercepting Fg D1
Sum: +11.459 - 5.666 = +5.793 IPCs damage/SBR

---

Triple A SBR for 1942.2:
1 StB doing SBR without interceptor (damage 1D6)
Sum: +2.917 - 2 = +0.917 IPC damage/SBR run

1 StB A1 against 1 Fg D1
Sum: +3.69 - 3.667 = +0.023 IPC damage/SBR run

1 StB A1 doing SBR against 2 intercepting Fgs D1
Sum: + 2.025 - 5.056 = -3.031 IPCs damage/SBR

1 StB & 1 Fg A1 doing SBR against 2 intercepting Fgs D1
Sum: +6.155 - 5.33 = +0.825 IPC damage/SBR

2 StBs A1 doing SBR against 2 intercepting Fgs D1
Sum: +8.195 - 7.334 = +0.861 IPC damage/SBR

1 StB & 1 Fg A1 doing SBR against 1 intercepting Fg D1
Sum: + 5.973 - 3.667 = +2.306 IPCs damage/SBR

2 StBs A1 doing SBR against 1 intercepting Fg D1
Sum: +8.403 - 5.666 = +2.737 IPCs damage/SBR

---

OOB SBR rules for 1942.2:
1 StB doing SBR without interceptor damage: 1D6
Sum: + 2.917 - 2 = +0.917 IPC damage/SBR

1 StB A1 first strike against 1 Fg D2
Sum: + 3.8 - 4.8 = -1 IPC damage/SBR

1 StB A1 first strike doing SBR against 2 intercepting Fgs D2
Sum: + 3.071 - 7.185 = -4.114 IPC. damage/SBR

1 StB & 1 Fg A1 first strike doing SBR against 2 intercepting Fgs D2
Sum: + 6.018 - 7.555 = -1.537 IPCs damage/SBR

2 StBs A1 first strike doing SBR against 2 intercepting Fgs D2
Sum: +7.547 - 9.556 = -2.009 IPCs damage/SBR

1 StB & 1 Fg A1 first strike doing SBR against 1 intercepting Fg D2
Sum: + 5.973 - 5.159 = +0.814 IPCs damage/SBR

2 StBs A1 first strike doing SBR against 1 intercepting Fg D2
Sum: + 8.214 - 6.315 = +1.899 IPCs damage/SBR

---

1942.2 SBR House Rules :
1 StB doing SBR without interceptor, damage 1D6+2
Sum: + 4.583 - 2 = +2.583 IPCs damage/SBR

1 StB A1 regular vs 1 Fg D2
Sum: + 4.723 - 5.333 = -0.61 IPC. damage/SBR

1 StB A1 regular doing SBR against 2 intercepting Fgs D2
Sum: +3.704 - 7.556 = -3.852 IPCs damage/SBR

1 StB & 1 Fg A1 first strike (due to combined arms with Fg escort) doing SBR against 2 intercepting Fgs D2
Sum: + 7.554 - 7.564 = -0.01 IPC damage/SBR

2 StBs A1 regular doing SBR against 2 intercepting Fgs D2
Sum: +9.445 - 10.667 = -1.222 IPCs damage/SBR

1 StB & 1 Fg A1 first strike (due to combined arms with Fg escort) doing SBR against 1 intercepting Fg D2
Sum: + 7.639 - 5.159 = +2.48 IPCs damage/SBR

2 StBs A1 regular doing SBR against 1 intercepting Fg D2
Sum: +10.639 - 7.334 = +3.304 IPCs damage/SBR

1942.2 SBR HR #1 OOB + Higher damage for StB
1 StB doing SBR without interceptor damage: 1D6+2
Sum: 4.583 - 2 = +2.583 IPCs damage/SBR

1 StB A1 first strike vs 1 Fg D2
Sum: 4.977 - 4.778 = +0.199 IPC damage/SBR

1 StB A1 first strike doing SBR against 2 intercepting Fgs D2
Sum: + 3.874 - 7.185 = -3.311 IPCs damage/SBR

1 StB & 1 Fg A1 first strike doing SBR against 2 intercepting Fgs D2
Sum: 7.554 - 7.555 = -0.001 IPC damage/SBR

2 StBs A1 first strike doing SBR against 2 intercepting Fgs D2
D6+2: +9.954 - 9.556 = +0.398 IPC damage/SBR
D6+3: +11.158 - 9.556 = +1.602 IPCs damage/SBR
2D6: +11.760 - 9.556 = +2.204 IPCs damage/SBR

1 StB & 1 Fg A1 first strike doing SBR against 1 intercepting Fgs D2
Sum: + 7.639 - 5.159 = +2.480 IPCs damage/SBR

2 StBs A1 first strike doing SBR against 1 intercepting Fgs D2
Sum: + 11.162 - 6.315 = +4.847 IPCs damage/SBR

1942.2 OOB SBR with higher damage for StB : 1 StB doing SBR without interceptor damage: 1D6+2
5/6 StB survived * 5.5 IPCs = 4.583 IPCs
1/6 StB killed *12 IPCs = -2 IPCs
Sum: 4.583 - 2 = +2.583 IPCs damage/SBR

1 StB A1 first strike vs 1 Fg D2

StB roll /Fg roll / AAA roll = odds casualties

161= 6/216 1 StB killed by AAA vs 1 Fg killed: 3%
165= 30/216 no casualty vs 1 Fg killed: 14%

526= 60/216 StB killed by Fg: 28%
541= 20/216 StB killed by AAA: 9%
545= 100/216 both survived: 46%

Results:
Bombard on IC 130/216 = 60.185% * ((3+8 IPCs)/2= +5.5 IPCs) = + 3.310 IPCs / D6+3 : * 6.5 = 3.912 IPCs/SBR / 2D6 : *7 = +4.213 IPCs/SBR
Killing Fg 36/216 = 16.667% *+10 IPC = + 1.667 IPC
StB killed 86/216 =39.815% *-12 IPCs = - 4.778 IPCs
D6+2: +4.977 - 4.778 = + 0.199 IPC damage/SBR
D6+3: +5.579 - 4.778 = + 0.801 IPC damage/SBR
2D6: +5.880 - 4.778 = +1.102 IPCs damage/SBR

1 StB A1 first strike doing SBR against 2 intercepting Fgs D2 / damage 1D6+2

StB roll /Fg roll / AAA roll = odds casualties

112/366= 72/1296 1 StB killed by Fg vs 1 Fg killed
124/361= 24/1296 1 StB killed by AAA vs 1 Fg killed
124/365= 120/1296 no casualty vs 1 Fg killed

520/366= 600/1296 StB killed by Fg vs no casualty
516/361= 80/1296 StB killed by AAA vs no casualty
516/365= 400/1296 no casualty at all

Results:
Bombard on IC 520/1296= 40.123% * ((3+8 IPCs)/2= +5.5 IPCs) = + 2.207 IPCs
killing 1 Fg 216/1296= 16.667% +10 IPC = + 1.667 IPC
StB killed 776/1296 = 59.877%-12 IPCs = - 7.185 IPCs
Sum: + 3.874 - 7.185 = -3.311 IPCs damage/SBR

1 StB & 1 Fg A1 first strike doing SBR against 2 intercepting Fgs D2

StB+Fg rolls/interceptors Fgs roll/ AAA roll = odds casualties

1/3636/361/6 = 36/7776 1 StB killed by AAA vs 2 Fgs : .5%
1/3636/365/6 = 180/7776 no casualty vs 2 Fgs : 2.3%

10/3612/361/6 = 120/7776 1 Fg and 1 StB killed by AAA vs 1 Fg : 1.5%
10/3612/365/6 = 600/7776 1 Fg vs 1 Fg : 7.7%
10/3624/361/6= 240/7776 1 StB killed by AAA vs 1 Fg : 3.1%
10/3624/365/6 = 1200/7776 no casualty vs 1 Fg : 15.4%

25/364/366/6 = 600/7776 1 Fg and 1 StB killed by Fg vs no casualty : 7.7%
25/3616/361/6 = 400/7776 1 Fg and 1 StB killed by AAA vs no casualty : 5.2%
25/3616/365/6 = 2000/7776 1 Fg vs no casualty : 25.7%
25/3616/361/6 = 400/7776 1 StB killed by AAA vs no casualty : 5.2%
25/3616/365/6 = 2000/7776 no casualty at all : 25.7%

Results:
Bombard on IC: 76.8% * ((3+8) IPCs)/2= +5.5 IPCs) = +4.224 IPCs
Killing 2 Fgs: 2.8%+20 IPCs = + 0.56 IPC
Killing 1 Fg: 27.7% +10 IPCs = + 2.77 IPCs
Fg killed: 33.4%-10 IPCs = - 3.34 IPCs
StB killed: 8.8%-12 IPCs = - 1.056 IPCs
StB & Fg killed: 14.4%*-22 IPCs = - 3.168 IPCs

Sum: 7.554 - 7.555 = -0.001 IPCs damage/SBR

2 StBs A1 first strike doing SBR against 2 intercepting Fgs D2

StBs rolls/interceptors Fgs roll/ AAA roll = odds casualties

1/3636/361/36 = 36/46656 2 StBs killed by AAA vs 2 Fgs : 0.077%
1/3636/3610/36 = 360/46656 1 StB killed by AAA vs 2 Fgs : 0.772%
1/3636/3625/36 = 900/46656 no casualty vs 2 Fgs : 1.929%

10/3612/366/36 = 720/46656 1 StB killed by Fg and 1 StB killed by AAA vs 1 Fg : 1.543%
10/3612/3630/36 = 3600/46656 1 StB killed by Fg vs 1 Fg : 7.716%
10/3624/361/36= 240/46656 2 StBs killed by AAA vs 1 Fg : 0.514%
10/3624/3610/36= 2400/46656 1 StB killed by AAA vs 1 Fg : 5.144%
10/3624/3625/36 = 6000/46656 no casualty vs 1 Fg : 12.86%

25/364/3636/36 = 3600/46656 2 StBs killed by Fg vs no casualty : 7.716%
25/3616/366/36 = 2400/46656 1 StB killed by Fg and 1 StB killed by AAA vs no casualty : 5.144%
25/3616/3630/36 = 12000/46656 1 StBs killed by Fg vs no casualty : 25.72%
25/3616/361/36 = 400/46656 2 StBs killed by AAA vs no casualty : 0.857%
25/3616/3610/36 = 4000/46656 1 StB killed by AAA vs no casualty : 8.573%
25/3616/3625/36 = 10000/46656 no casualty at all : 21.433%

Results:
2x Bombard on IC: 16900/46656= 36.222% * ((6+16) IPCs)/2= +11 IPCs) = + 3.984 IPCs / D6+3 : *13 = 4.709 IPCs/SBR / 2D6 : 14 = +5.071 IPCs/SBR
1x Bombard on IC: 22360/46656= 47.925% * ((3+8) IPCs)/2= +5.5 IPCs) = +2.636 IPCs  / D6+3 : * 6.5 = 3.115 IPCs/SBR / 2D6 : 7 = +3.355 IPCs/SBR
Killing 2 Fgs: 2.778%+20 IPCs = + 0.556 IPC
Killing 1 Fg: 27.778% +10 IPCs = + 2.778 IPCs
2 StBs killed: 7396/46656= 15.852%-24 IPCs = - 3.805 IPCs
1 StB killed: 22360/46656= 47.925%-12 IPCs = - 5.751 IPCs

D6+2: +9.954 - 9.556 = +0.398 IPC damage/SBR
D6+3: +11.158 - 9.556 = +1.602 IPCs damage/SBR
2D6: +11.760 - 9.556 = +2.204 IPCs damage/SBR

1 StB & 1 Fg A1 first strike doing SBR against 1 intercepting Fgs D2

StB+Fg rolls/interceptors Fgs roll/ AAA roll = odds casualties

11/366/61/6= 66/1296 1 StB killed by AAA vs 1 Fg
11/366/65/6 = 330/1296 no casualty vs 1 Fg

25/362/61/6 = 50/1296 1 Fg and 1 StB killed by AAA vs no casualty
25/362/65/6 = 250/1296 1 Fg vs no casualty
25/364/61/6 = 100/1296 1 StB killed by AAA vs no casualty
25/364/65/6 = 500/1296 no casualty at all

Results:
Bombard on IC: 1080/1296 = 83.333% * ((3+8) IPCs)/2= +5.5 IPCs) = + 4.583 IPCs
Killing 1 Fg: 396/1296 = 30.556% +10 IPCs = + 3.056 IPCs
Fg killed: 300/1296 = 23.148%-10 IPCs = - 2.31 IPCs
StB killed: 216/1296 = 16.667%-12 IPCs = - 2 IPCs
StB & Fg killed: 50/1296 = 3.858%-22 IPCs = - 0.849 IPCs

Sum: + 7.639 - 5.159 = + 2.480 IPCs damage/SBR

2 StBs A1 first strike doing SBR against 1 intercepting Fgs D2

StBs rolls/interceptors Fgs roll/ AAA roll = odds casualties

11/366/61/36 = 66/7776 2 StBs killed by AAA vs 1 Fg : 0.849%
11/366/610/36 = 660/7776 1 StB killed by AAA vs 1 Fg : 8.488%
11/366/625/36 = 1650/7776 no casualty vs 1 Fg : 21.219%

25/362/66/36 = 300/7776 1 StB killed by Fg and 1 StB killed by AAA vs no casualty : 3.858%
25/362/630/36 = 1500/7776 1 StBs killed by Fg vs no casualty : 19.29%
25/364/61/36 = 100/7776 2 StBs killed by AAA vs no casualty : 1.286%
25/364/610/36 = 1000/7776 1 StB killed by AAA vs no casualty : 12.86%
25/364/625/36 = 2500/7776 no casualty at all : 32.15%

Results:
2x Bombard on IC: 4150/7776= 53.369% * ((6+16) IPCs)/2= +11 IPCs) = + 5.871 IPCs
1x Bombard on IC: 3160/7776= 40.638% * ((3+8) IPCs)/2= +5.5 IPCs) = +2.235 IPCs
Killing 1 Fg: 2376/7776 = 30.556% +10 IPCs = + 3.056 IPCs
2 StBs killed: 466/7776= 5.993%-24 IPCs = - 1.438 IPCs
1 StB killed: 3160/7776= 40.638%*-12 IPCs = - 4.877 IPCs

Sum: + 11.162 - 6.315 = + 4.847 IPCs damage/SBR

Another special rule which can be added to the last new values for StB A0 Damage: 2D6, however I think it would be a major deterrent against attacking SBR is:
Any intercepting Fighters hit must be apply to Strategic bombers first.

That way, even a swarm of Fighters will not be able to prevent bombers from being hit by intercepting Fighters.

This will greatly reduces the odds compared to OOB G40, but this can be frustrating from a defender POV if all StBs are well protected behind a few Fgs which can be use as fodder.

Do you think this could be an interesting rule or not?

This would change these two results:

1 Fighter Attack 1 First Strike and 1 Strategic Bomber Att 0 doing SBR against 2 interceptors Def 1
Interceptors always hit StBomber first.

Fighter roll/interceptors Fgs roll/ AAA roll = odds casualties

1/66/366/6= 36/1296 1 StB killed by Fg vs 1 Fg
1/630/361/6 = 30/1296 1 StB killed by AAA vs 1 Fg
1/630/365/6 = 150/1296 No casualty vs 1 Fg

5/61/366/6 = 30/1296 1 Fg and 1 StB killed by Fg vs no casualty
5/610/366/6 = 300/1296 1 StB killed by Fg vs no casualty
5/625/361/6 = 125/1296 1 StB killed by AAA vs no casualty
5/625/365/6 = 625/1296 no casualty at all

Results:
Bombard on IC: 775/1296 * ((1+2)+(6+2) IPCs)/2= +7 IPCs) = + 4.186 IPCs
Killing 1 Fg: 216/1296 +10 IPCs = + 1.667 IPCs
StB killed: 491/1296-12 IPCs = - 4.546 IPCs
StB & Fg killed: 30/1296*-22 IPCs = - 0.509 IPCs

Sum: + 5.853 - 5.055 = + 0.798 IPC damage/SBR run
compared to:
Sum: + 7.365 - 5.055 = + 2.310 IPC damage/SBR run

1 Fighter Att 1 First Strike and 1 Strategic Bomber Att 0 doing SBR against 1 interceptor Def 1
Interceptors always hit StBomber first.

Fighter roll/interceptor Fg roll/ AAA roll = odds casualties

1/66/61/6 = 6/216 1 StB killed by AAA vs 1 Fg
1/66/65/6 = 30/216 No casualty vs 1 Fg

5/61/66/6 = 30/216 1 StB killed by Fg vs no casualty
5/65/61/6 = 25/216 1 StB killed by AAA vs no casualty
5/65/65/6 = 125/216 no casualty at all

Results:
Bombard on IC: 155/216 * ((1+2)+(6+2) IPCs)/2= +7 IPCs) = + 5.023 IPCs
Killing 1 Fg: 36/216 +10 IPCs = + 1.667 IPCs
StB killed: 61/216-12 IPCs = - 3.389 IPCs

Sum: + 6.690 - 3.389 = + 3.301 IPC damage/SBR run

Compared to:
Sum: + 7.500 - 3.388 = + 4.112 IPC damage/SBR run

1 Fighter Attack 1 First Strike and 1 Strategic Bomber Att 0 Damage: D6+3 doing SBR against 2 interceptors Def 1
Interceptors always hit Strategic Bomber first.

Fighter roll/interceptors Fgs roll/ AAA roll = odds casualties

1/66/366/6= 36/1296 1 StB killed by Fg vs 1 Fg
1/630/361/6 = 30/1296 1 StB killed by AAA vs 1 Fg
1/630/365/6 = 150/1296 No casualty vs 1 Fg

5/61/366/6 = 30/1296 1 Fg and 1 StB killed by Fg vs no casualty
5/610/366/6 = 300/1296 1 StB killed by Fg vs no casualty
5/625/361/6 = 125/1296 1 StB killed by AAA vs no casualty
5/625/365/6 = 625/1296 no casualty at all

Results:
Bombard on IC: 775/1296 * ((1+3)+(6+3) IPCs)/2= +6.5 IPCs) = + 3.887 IPCs
Killing 1 Fg: 216/1296 +10 IPCs = + 1.667 IPCs
StB killed: 491/1296-12 IPCs = - 4.546 IPCs
StB & Fg killed: 30/1296*-22 IPCs = - 0.509 IPCs

Sum: + 5.554 - 5.055 = + 0.499 IPC damage/SBR
compared to:
Fg A1_fs_D1 regular combat: + 6.958 - 5.055 = + 1.903 IPC damage/SBR

1 Fighter Att 1 First Strike and 1 Strategic Bomber Att 0 doing SBR against 1 interceptor Def 1
Interceptors always hit Strategic Bomber first.

Fighter roll/interceptor Fg roll/ AAA roll = odds casualties

1/66/61/6 = 6/216 1 StB killed by AAA vs 1 Fg
1/66/65/6 = 30/216 No casualty vs 1 Fg

5/61/66/6 = 30/216 1 StB killed by Fg vs no casualty
5/65/61/6 = 25/216 1 StB killed by AAA vs no casualty
5/65/65/6 = 125/216 no casualty at all

Results:
Bombard on IC: 155/216 * ((1+3)+(6+3) IPCs)/2= +6.5 IPCs) = + 4.664 IPCs
Killing 1 Fg: 36/216 +10 IPCs = + 1.667 IPCs
StB killed: 61/216-12 IPCs = - 3.389 IPCs

Sum: + 6.331 - 3.389 = + 2.942 IPC damage/SBR run

Compared to:
Fg A1_fs_D1 regular combat: + 7.084 - 3.388 = + 3.696 IPC damage/SBR

G40: 1 StB doing SBR without interceptor, damage D6+3
5/6 StB survived * 6.5 IPCs = 5.417 IPCs
1/6 StB killed *12 IPCs = -2 IPCs

Sum: 5.417 - 2 = +3.417 IPCs damage/StB

G40: 1 StB A1 damage: 1D6+3 & 1 Fg A1 doing SBR against 2 intercepting Fgs D1
Interceptors always hit Bomber first.

StB+Fg rolls / interceptors Fgs roll / AAA roll = odds casualties

1/361/366/6  = 6/7776   1 Fg and 1 StB killed by Fg vs 2 Fgs
1/3610/366/6 = 60/7776  **1 StB killed by Fg vs 2 Fgs
1/3625/361/6 = 25/7776  1 StB killed by AAA vs 2 Fgs
1/3625/365/6 =125/7776  no casualty vs 2 Fgs

10/361/366/6 = 60/7776  1 Fg and 1 StB killed by Fg vs 1 Fg
10/3610/366/6= 600/7776  1 StB killed by Fg vs 1 Fg
10/3625/361/6 = 250/7776  1 StB killed by AAA vs 1 Fg
10/3625/365/6 = 1250/7776  no casualty vs 1 Fg

25/361/366/6 = 150/7776  1 Fg and 1 StB killed by Fg vs no casualty :
25/3610/366/6 = 1500/7776 1 StB killed by Fg vs no casualty :
25/3625/361/6 = 625/7776 1 StB killed by AAA vs no casualty
25/3625/365/6 = 3125/7776 no casualty at all

Results:
Bombard on IC: 4500/7776= 57.870% * ((1+2) +(6+2) IPCs)/2= +6.5 IPCs) = 3.762 IPCs
Killing 2 Fgs: 216/7776= 2.778%+20 IPCs = + 0.554 IPC
Killing 1 Fg: 2160/7776= 27.778% +10 IPCs = + 2.778 IPCs
Fg killed: 0/7776-10 IPCs = - 0.00 IPCs
StB killed: 3060/7776= 39.352%-12 IPCs = - 4.722 IPCs
StB & Fg killed: 216/7776= 2.778%*-22 IPCs = - 0.611 IPCs

Sum: +7.094 - 5.333 = + 1.761 IPCs damage/StB

Compared to:
StB A1 D6+3 Fg A1D1 regular combat: 8.585 - 5.33 = + 3.255 IPCs damage/StB

G40 SBR: 1 StB A1 & 1 Fg A1 doing SBR against 1 intercepting Fgs D1
Interceptors always hit Bomber first.

StB+Fg rolls/interceptors Fgs roll/ AAA roll = odds casualties

11/361/66/6 = 66/1296 1 StB killed by Fg vs 1 Fg
11/365/61/6 = 55/1296 1 StB killed by AAA vs 1 Fg
11/365/65/6 = 275/1296 no casualty vs 1 Fg

25/361/66/6 = 150/1296 1 StB killed by Fg vs no casualty
25/365/61/6 = 125/1296 1 StB killed by AAA vs no casualty
25/365/65/6 = 625/1296 no casualty at all

Results:
Bombard on IC: 900/1296 = 69.444% * ((3+8) IPCs)/2= +6.5 IPCs) = 4.514 IPCs
Killing 1 Fg: 396/1296 = 30.556%* +10 IPCs = + 3.056 IPCs
Fg killed: 0/1296 = 0.00%* -10 IPCs = - 0.000 IPCs
StB killed: 396/1296 = 30.556%-12 IPCs = - 3.667 IPCs
StB & Fg killed: 0/1296 = 0.000%-22 IPCs = - 0.000 IPCs

Sum: +7.570 - 3.667 = + 3.903 IPCs damage/StB

Compared to:
StB A1 D6+3 Fg A1D1 regular combat: + 8.473 - 3.667 = + 4.806 IPCs damage/SBR run

G40: 2 StBs doing SBR without interceptor, damage D6+3
2* 5/6 StB survived * 6.5 IPCs = 5.417 IPCs
2* 1/6 StB killed *12 IPCs = -2 IPCs

Sum: 10.834 - 4 = +6.834 IPCs damage/StB**

Trying to figure out a different SBR which gives Fg interceptor a Defense @2, I’m looking below to see what are the odds of the following combat values:

Strategic Bomber in air-to-air combat SBR:
Attack 1 First Strike
Bombard IC or AB or NB damage: 2D6

Fighter in air-to-air combat SBR:
Attack 1 First Strike
Defend 1

Tactical Bomber in air-to-air combat SBR:
Attack 1 First Strike
Bombard AB or NB damage: 1D6

IC’s AAA: @1 against each Strategic Bomber
Naval Base or Air Base AA gun: @1 against each Strategic Bomber or Tactical bomber

based on OOB 1942.2 SBR + Double damage for StB
1 StB doing SBR without interceptor damage: 2D6
Sum: 5.833 - 2 = +3.833 IPCs damage/StB run

1 StB A1 first strike vs 1 Fg D2
Sum: 5.880 - 4.778 = + 1.102 IPC damage/StB

1 StB A1 first strike doing SBR against 2 intercepting Fgs D2
Sum: + 4.476 - 7.185 = - 2.709 IPCs damage/SBR

1 StB & 1 Fg A1 first strike doing SBR against 2 intercepting Fgs D2
Sum: 8.706 - 7.555 = + 1.151 IPCs damage/StB

2 StBs A1 first strike doing SBR against 2 intercepting Fgs D2
Sum: +11.760 - 9.556 = + 2.204 IPCs damage/StB

1 StB & 1 Fg A1 first strike doing SBR against 1 intercepting Fgs D2
Sum: + 8.889 - 5.159 = + 3.730 IPCs damage/SBR run

2 StBs A1 first strike doing SBR against 1 intercepting Fgs D2
Sum: + 13.373 - 6.315 = + 7.058 IPCs damage/SBR run

1942.2 OOB SBR with higher damage for StB : 1 StB doing SBR without interceptor damage: 2D6
5/6 StB survived * 7 IPCs = 5.833 IPCs
1/6 StB killed *12 IPCs = -2 IPCs
Sum: 5.833 - 2 = +3.833 IPCs damage/StB run

1 StB A1 first strike vs 1 Fg D2

StB roll /Fg roll / AAA roll = odds casualties

161= 6/216 1 StB killed by AAA vs 1 Fg killed: 3%
165= 30/216 no casualty vs 1 Fg killed: 14%

526= 60/216 StB killed by Fg: 28%
541= 20/216 StB killed by AAA: 9%
545= 100/216 both survived: 46%

Results:
Bombard on IC 130/216 = 60.185% * ((3+8 IPCs)/2= +7 IPCs) = + 4.213 IPCs
Killing Fg  36/216 = 16.667% *+10 IPC = + 1.667 IPC
StB killed 86/216 =39.815%  *-12 IPCs = - 4.778 IPCs
Sum: 5.880 - 4.778 = + 1.102 IPC damage/StB

1 StB A1 first strike doing SBR against 2 intercepting Fgs D2 / damage 2D6

StB roll /Fg roll / AAA roll = odds casualties

112/366= 72/1296 1 StB killed by Fg vs 1 Fg killed
124/361= 24/1296 1 StB killed by AAA vs 1 Fg killed
124/365= 120/1296 no casualty vs 1 Fg killed

520/366= 600/1296 StB killed by Fg vs no casualty
516/361= 80/1296 StB killed by AAA vs no casualty
516/365= 400/1296 no casualty at all

Results:
Bombard on IC 520/1296= 40.123% * ((3+8 IPCs)/2= +7 IPCs) = + 2.809 IPCs
killing 1 Fg 216/1296= 16.667% +10 IPC = + 1.667 IPC
StB killed 776/1296 = 59.877%-12 IPCs = - 7.185 IPCs
Sum: + 4.476 - 7.185 = - 2.709 IPCs damage/SBR

1 StB & 1 Fg A1 first strike doing SBR against 2 intercepting Fgs D2

StB+Fg rolls/interceptors Fgs roll/ AAA roll = odds casualties

1/3636/361/6 = 36/7776 1 StB killed by AAA vs 2 Fgs : .5%
1/3636/365/6 = 180/7776 no casualty vs 2 Fgs : 2.3%

10/3612/361/6 = 120/7776 1 Fg and 1 StB killed by AAA vs 1 Fg : 1.5%
10/3612/365/6 = 600/7776 1 Fg vs 1 Fg : 7.7%
10/3624/361/6= 240/7776 1 StB killed by AAA vs 1 Fg : 3.1%
10/3624/365/6 = 1200/7776 no casualty vs 1 Fg : 15.4%

25/364/366/6 = 600/7776 1 Fg and 1 StB killed by Fg vs no casualty : 7.7%
25/3616/361/6 = 400/7776 1 Fg and 1 StB killed by AAA vs no casualty : 5.2%
25/3616/365/6 = 2000/7776 1 Fg vs no casualty : 25.7%
25/3616/361/6 = 400/7776 1 StB killed by AAA vs no casualty : 5.2%
25/3616/365/6 = 2000/7776 no casualty at all : 25.7%

Results:
Bombard on IC: 76.8% * ((3+8) IPCs)/2= +7 IPCs) = +5.376 IPCs
Killing 2 Fgs: 2.8%+20 IPCs = + 0.56 IPC
Killing 1 Fg: 27.7% +10 IPCs = + 2.77 IPCs
Fg killed: 33.4%-10 IPCs = - 3.34 IPCs
StB killed: 8.8%-12 IPCs = - 1.056 IPCs
StB & Fg killed: 14.4%*-22 IPCs = - 3.168 IPCs

Sum: 8.706 - 7.555 = + 1.151 IPCs damage/StB

2 StBs A1 first strike doing SBR against 2 intercepting Fgs D2

StBs rolls/interceptors Fgs roll/ AAA roll = odds casualties

1/3636/361/36 = 36/46656 2 StBs killed by AAA vs 2 Fgs : 0.077%
1/3636/3610/36 = 360/46656 1 StB killed by AAA vs 2 Fgs : 0.772%
1/3636/3625/36 = 900/46656 no casualty vs 2 Fgs : 1.929%

10/3612/366/36 = 720/46656 1 StB killed by Fg and 1 StB killed by AAA vs 1 Fg : 1.543%
10/3612/3630/36 = 3600/46656 1 StB killed by Fg vs 1 Fg : 7.716%
10/3624/361/36= 240/46656 2 StBs killed by AAA vs 1 Fg : 0.514%
10/3624/3610/36= 2400/46656 1 StB killed by AAA vs 1 Fg : 5.144%
10/3624/3625/36 = 6000/46656 no casualty vs 1 Fg : 12.86%

25/364/3636/36 = 3600/46656 2 StBs killed by Fg vs no casualty : 7.716%
25/3616/366/36 = 2400/46656 1 StB killed by Fg and 1 StB killed by AAA vs no casualty : 5.144%
25/3616/3630/36 = 12000/46656 1 StBs killed by Fg vs no casualty : 25.72%
25/3616/361/36 = 400/46656 2 StBs killed by AAA vs no casualty : 0.857%
25/3616/3610/36 = 4000/46656 1 StB killed by AAA vs no casualty : 8.573%
25/3616/3625/36 = 10000/46656 no casualty at all : 21.433%

Results:
2x Bombard on IC: 16900/46656= 36.222% * ((6+16) IPCs)/2= +14 IPCs) = + 5.071 IPCs
1x Bombard on IC: 22360/46656= 47.925% * ((3+8) IPCs)/2= +7 IPCs) = +3.355 IPCs
Killing 2 Fgs: 2.778%+20 IPCs = + 0.556 IPC
Killing 1 Fg: 27.778% +10 IPCs = + 2.778 IPCs
2 StBs killed: 7396/46656= 15.852%-24 IPCs = - 3.805 IPCs
1 StB killed: 22360/46656= 47.925%-12 IPCs = - 5.751 IPCs

Sum: +11.760 - 9.556 = + 2.204 IPCs damage/StB

1 StB & 1 Fg A1 first strike doing SBR against 1 intercepting Fgs D2

StB+Fg rolls/interceptors Fgs roll/ AAA roll = odds casualties

11/366/61/6= 66/1296 1 StB killed by AAA vs 1 Fg
11/366/65/6 = 330/1296 no casualty vs 1 Fg

25/362/61/6 = 50/1296 1 Fg and 1 StB killed by AAA vs no casualty
25/362/65/6 = 250/1296 1 Fg vs no casualty
25/364/61/6 = 100/1296 1 StB killed by AAA vs no casualty
25/364/65/6 = 500/1296 no casualty at all

Results:
Bombard on IC: 1080/1296 = 83.333% * ((3+8) IPCs)/2= +7 IPCs) = + 5.833 IPCs
Killing 1 Fg: 396/1296 = 30.556% +10 IPCs = + 3.056 IPCs
Fg killed: 300/1296 = 23.148%-10 IPCs = - 2.31 IPCs
StB killed: 216/1296 = 16.667%-12 IPCs = - 2 IPCs
StB & Fg killed: 50/1296 = 3.858%-22 IPCs = - 0.849 IPCs

Sum: + 8.889 - 5.159 = + 3.730 IPCs damage/SBR run

2 StBs A1 first strike doing SBR against 1 intercepting Fgs D2

StBs rolls/interceptors Fgs roll/ AAA roll = odds casualties

11/366/61/36 = 66/7776 2 StBs killed by AAA vs 1 Fg : 0.849%
11/366/610/36 = 660/7776 1 StB killed by AAA vs 1 Fg : 8.488%
11/366/625/36 = 1650/7776 no casualty vs 1 Fg : 21.219%

25/362/66/36 = 300/7776 1 StB killed by Fg and 1 StB killed by AAA vs no casualty : 3.858%
25/362/630/36 = 1500/7776 1 StBs killed by Fg vs no casualty : 19.29%
25/364/61/36 = 100/7776 2 StBs killed by AAA vs no casualty : 1.286%
25/364/610/36 = 1000/7776 1 StB killed by AAA vs no casualty : 12.86%
25/364/625/36 = 2500/7776 no casualty at all : 32.15%

Results:
2x Bombard on IC: 4150/7776= 53.369% * ((6+16) IPCs)/2= +14 IPCs) = + 7.472 IPCs
1x Bombard on IC: 3160/7776= 40.638% * ((3+8) IPCs)/2= +7 IPCs) = + 2.845 IPCs
Killing 1 Fg: 2376/7776 = 30.556% +10 IPCs = + 3.056 IPCs
2 StBs killed: 466/7776= 5.993%-24 IPCs = - 1.438 IPCs
1 StB killed: 3160/7776= 40.638%*-12 IPCs = - 4.877 IPCs

Sum: + 13.373 - 6.315 = + 7.058 IPCs damage/SBR run

1942.2 SBR House Rules #2 : StB A1 Dmg 1D6+2, gets First Strike if escorted by at least 1 Fighter
1 StB doing SBR without interceptor, damage 1D6+2
Sum: + 4.583 - 2 = +2.583 IPCs damage/SBR run

1 StB A1 regular vs 1 Fg D2
Sum: + 4.723 - 5.333 = - 0.61 IPC damage/SBR run

1 StB A1 regular doing SBR against 2 intercepting Fgs D2
Sum: +3.704 - 7.556 = - 3.852 IPCs damage/SBR run

1 StB & 1 Fg A1 first strike (due to combined arms with Fg escort) doing SBR against 2 intercepting Fgs D2
Sum: + 7.554 - 7.564 = - 0.01 IPC damage/SBR run

2 StBs A1 regular doing SBR against 2 intercepting Fgs D2
Sum: +9.445 - 10.667 = - 1.222 IPCs damage/SBR run

1 StB & 1 Fg A1 first strike (due to combined arms with Fg escort) doing SBR against 1 intercepting Fg D2
Sum: + 7.639 - 5.159 = + 2.48 IPCs damage/SBR run

2 StBs A1 regular doing SBR against 1 intercepting Fg D2
Sum: +10.639 - 7.334 = + 3.304 IPCs damage/SBR run

G40 OOB SBR:                                                 / 1942.2 SBR HR #1, OOB+ Higher damage: 1D6+2 /               1942.2 SBR HR #2
1 StB doing SBR without interceptor
Sum: +4.583 - 2 = +2.583 IPCs damage/SBR run                                                      Same                                                              Same

1 StB A1 against 1 Fg D1 damage: 1D6+2                                1 StB A1 first strike vs 1 Fg D2                            /     1 StB A1 regular vs 1 Fg D2
Sum: + 5.486 - 3.667 = + 1.819 IPCs damage/SBR run            +4.977 - 4.778 = + 0.199 IPC                          /   +4.723 - 5.333 = - 0.61 IPC damage/SBR run

1 StB A1 doing SBR against 2 intercepting Fgs D1
Sum: + 4.85 - 5.056 = - 0.206 IPC damage/SBR run           +3.874 - 7.185 = - 3.311 IPCs damage/SBR run     / +3.704 - 7.556 = - 3.852 IPCs damage/SBR run

1 StB & 1 Fg A1 doing SBR against 2 intercepting Fgs D1
Sum: +7.775 - 5.33 = + 2.445 IPCs damage/SBR run           +7.554 - 7.555 = - 0.001 IPC damage/SBR run     /  +7.554 - 7.564 = - 0.01 IPC damage/SBR run

2 StBs A1 doing SBR against 2 intercepting Fgs D1
Sum: +10.973 - 7.334 = + 3.639 IPCs damage/SBR run       +9.954 - 9.556 = - 0.002 IPC damage/SBR run     /  +9.445 - 10.667 = - 1.222 IPCs damage/SBR run

1 StB & 1 Fg A1 doing SBR against 1 intercepting Fg D1
Sum: + 7.639 - 3.667 = + 3.972 IPCs damage/SBR run            +7.639 - 5.159 = + 2.480 IPCs damage/SBR run   /   +7.639 - 5.159 = + 2.48 IPCs damage/SBR run

2 StBs A1 doing SBR against 1 intercepting Fg D1
Sum: +11.459 - 5.666 = + 5.793 IPCs damage/SBR run           +11.162 - 6.315 = + 4.847 IPCs damage/SBR run    /   +10.639 - 7.334 = +3.304 IPCs damage/SBR run

Strategic Bomber in air-to-air combat SBR:
Attack 1
Bombard IC or AB or NB damage: 2D6

Fighter in air-to-air combat SBR:
Attack 1
Defend 2

Tactical Bomber in air-to-air combat SBR:
Attack 1
Bombard AB or NB damage: 1D6

IC’s AAA: @1 against each Strategic Bomber
Naval Base or Air Base: @1 against each Strategic Bomber or Tactical bomber

Global 1940 SBR HRules SBR damage 1D6+2 / Interceptor Def @2

Global40 SBR HRules : 1 StB doing SBR without interceptor, damage 1D6+2        / HR SBR = Damage 2D6 (avg 7 IPCs)
Sum: + 4.583 - 2 = +2.583 IPCs damage/SBR run                                                Sum: + 5.833 - 2 = +3.833 IPCs damage/SBR run

G40 SBR HRules :1 StB A1 regular vs 1 Fg D2
Sum: + 4.723 - 5.333 = - 0.61 IPC. damage/SBR run                                            Sum: + 5.556 - 5.333 = + 0.223 IPC. damage/SBR run

G40 SBR HR: 1 StB A1 regular doing SBR against 2 intercepting Fgs D2
Sum: +3.704- 7.556 = - 3.852 IPCs damage/SBR run                                            Sum: +4.260- 7.556 = - 3.296 IPCs damage/SBR run

G40 SBR HR: 1 StB & 1 Fg A1 doing SBR against 2 intercepting Fgs D2
Sum: + 7.408 - 8.667 = - 1.259 IPC damage/SBR run                                            Sum: + 8.519 - 8.667 = - 0.148 IPC damage/SBR run

G40 SBR HR: 2 StBs A1 regular doing SBR against 2 intercepting Fgs D2
Sum: +9.445 - 10.667 = - 1.222 IPCs damage/SBR run                                          Sum: +11.112 - 10.667 = + 0.445 IPCs damage/SBR run

G40 HR: 1 StB & 1 Fg A1 doing SBR against 1 intercepting Fgs D2
Sum: + 7.639 - 5.333 = + 2.306 IPCs damage/SBR run                                            Sum: + 8.889 - 5.333 = + 3.556 IPCs damage/SBR run

G40 SBR HR: 2 StBs A1 regular doing SBR against 1 intercepting Fgs D2         
Sum: +10.639 - 7.334 = + 3.304 IPCs damage/SBR run                                          Sum: +12.722 - 7.334 = + 5.388 IPCs damage/SBR run

Here is some maths evaluation to compare with other actual rules (provided in the above quote) :

Global40 SBR HRules : 1 StB doing SBR without interceptor, damage 1D6+2  / damage 2D6
5/6 StB survived * 5.5 IPCs = 4.583 IPCs                                  5/6 StB survived * 7 IPCs = + 5.833 IPCs
1/6 StB killed *12 IPCs = -2 IPCs

Sum: + 4.583 - 2 = +2.583 IPCs damage/SBR run          Sum: + 5.833 - 2 = +3.833 IPCs damage/SBR run

G40 SBR HRules :1 StB A1 regular vs 1 Fg D2

StB roll /Fg roll / AAA roll = odds casualties

1/62/66/6= 12/216 1 StB killed by AAA vs 1 Fg killed: 5.556%
1/64/61/6= 4/216 1 StB killed by AAA vs 1 Fg killed: 1.852%
1/64/65/6= 20/216 no casualty vs 1 Fg killed: 9.259%

5/62/66/6= 60/216 StB killed by Fg: 27.778%
5/64/61/6= 20/216 StB killed by AAA: 9.259%
5/64/65/6= 100/216 both survived: 46.296%

Results:
Bombard on IC 120/216= 55.556% * ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 3.056 IPCs        / +7 IPCs = +3.889 IPCs
killing Fg 36/216= 16.667% *+10 IPC = + 1.667 IPC
StB killed 96/216= 44.444% *-12 IPCs = - 5.333 IPCs
Sum: + 4.723 - 5.333 = - 0.61 IPC. damage/SBR run                              Sum: + 5.556 - 5.333 = + 0.223 IPC. damage/SBR run

G40 SBR HR: 1 StB A1 regular doing SBR against 2 intercepting Fgs D2

StBs rolls/interceptors Fgs roll/ AAA roll = odds casualties

1/620/366/6 = 120/1296 1 StB killed by Fg vs 1 Fg
1/616/361/6= 16/1296 1 StB killed by AAA vs 1 Fg
1/616/365/6 = 80/1296 no casualty vs 1 Fg

5/620/366/6 = 600/1296 1 StB killed by Fg vs no casualty
5/616/361/6 = 80/1296 1 StB killed by AAA vs no casualty
5/616/365/6 = 400/1296 no casualty at all

Results:
Bombard on IC: 480/1296= 37.037% * ((3+8) IPCs)/2= +5.5 IPCs) = +2.037 IPCs                    / +7 IPCs = +2.593 IPCs
Killing 1 Fg: 216/1296= 16.667% +10 IPCs = + 1.667 IPCs
1 StB killed: 816/1296= 62.963%-12 IPCs = - 7.556 IPCs

Sum: +3.704- 7.556 = - 3.852 IPCs damage/SBR run                                  Sum: +4.260- 7.556 = - 3.296 IPCs damage/SBR run

G40 SBR HR: 1 StB & 1 Fg A1 doing SBR against 2 intercepting Fgs D2

StB+Fg rolls/interceptors Fgs roll/ AAA roll = odds casualties
1/364/366/6 = 24/7776 1 Fg and 1 StB killed by Fgs vs 2 Fgs
1/3616/361/6 = 16/7776 1 Fg killed and 1 StB killed by AAA vs 2 Fgs
1/3616/365/6 = 80/7776 1 Fg killed vs 2 Fgs
1/3616/361/6 = 16/7776 1 StB killed by AAA vs 2 Fgs
1/3616/365/6 = 80/7776 no casualty vs 2 Fgs

10/364/366/6 = 240/7776 1 Fg and 1 StB killed by Fgs vs 1 Fg
10/3616/361/6 = 160/7776 1 Fg and 1 StB killed by AAA vs 1 Fg
10/3616/365/6 = 800/7776 1 Fg vs 1 Fg
10/3616/361/6= 160/7776 1 StB killed by AAA vs 1 Fg
10/3616/365/6 = 800/7776 no casualty vs 1 Fg

25/364/366/6 = 600/7776 1 Fg and 1 StB killed by Fg vs no casualty
25/3616/361/6 = 400/7776 1 Fg and 1 StB killed by AAA vs no casualty
25/3616/365/6 = 2000/7776 1 Fg vs no casualty
25/3616/361/6 = 400/7776 1 StB killed by AAA vs no casualty
25/3616/365/6 = 2000/7776 no casualty at all

Results:
Bombard on IC: 5760/7776= 74.07%* ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 4.074 IPCs            / +7 IPCs = +5.185 IPCs
Killing 2 Fgs: 216/7776= 2.78%+20 IPCs = + 0.556 IPC
Killing 1 Fg: 2160/7776= 27.78% +10 IPCs = + 2.778 IPCs
Fg killed: 2880/7776= 37.04%-10 IPCs = - 3.704 IPCs
StB killed: 576/7776= 7.41%-12 IPCs = - 0.889 IPCs
StB & Fg killed: 1440/7776=18.52%*-22 IPCs = - 4.074 IPCs

Sum: + 7.408 - 8.667 = - 1.259 IPC damage/SBR run                                  Sum: + 8.519 - 8.667 = - 0.148 IPC damage/SBR run

G40 SBR HR: 2 StBs A1 regular doing SBR against 2 intercepting Fgs D2

StBs rolls/interceptors Fgs roll/ AAA roll = odds casualties

1/364/3636/36 = 144/46656 2 StBs killed by Fg vs 2 Fgs: 0.309%
1/3616/366/36 = 96/46656 1 StB killed by Fg and 1 StB killed by AAA vs 2 Fgs : 0.206%
1/3616/3630/36 = 480/46656 1 StB killed by Fg vs 2 Fgs : 1.029%
1/3616/361/36 = 16/46656 2 StBs killed by AAA vs 2 Fgs : 0.034%
1/3616/3610/36 = 160/46656 1 StB killed by AAA vs 2 Fgs : 0.343%
1/3616/3625/36 = 400/46656 no casualty vs 2 Fgs : 0.857%

10/364/3636/36 = 1440/46656 2 StBs killed by Fg vs 1 Fg: 3.086%
10/3616/366/36 = 960/46656 1 StB killed by Fg and 1 StB killed by AAA vs 1 Fg : 2.058%
10/3616/3630/36 = 4800/46656 1 StB killed by Fg vs 1 Fg : 10.288%
10/3616/361/36= 160/46656 2 StBs killed by AAA vs 1 Fg : 0.343%
10/3616/3610/36= 1600/46656 1 StB killed by AAA vs 1 Fg : 3.429%
10/3616/3625/36 = 4000/46656 no casualty vs 1 Fg : 8.573%

25/364/3636/36 = 3600/46656 2 StBs killed by Fg vs no casualty : 7.716%
25/3616/366/36 = 2400/46656 1 StB killed by Fg and 1 StB killed by AAA vs no casualty : 5.144%
25/3616/3630/36 = 12000/46656 1 StBs killed by Fg vs no casualty : 25.72%
25/3616/361/36 = 400/46656 2 StBs killed by AAA vs no casualty : 0.857%
25/3616/3610/36 = 4000/46656 1 StB killed by AAA vs no casualty : 8.573%
25/3616/3625/36 = 10000/46656 no casualty at all : 21.433%

Results:
2x Bombard on IC: 14400/46656= 30.864% * ((6+16) IPCs)/2= +11 IPCs) = + 3.395 IPCs                    / +14 IPCs= + 4.321 IPCs
1x Bombard on IC: 23040/46656= 49.383% * ((3+8) IPCs)/2= +5.5 IPCs) = +2.716 IPCs                      / +7 IPCs = + 3.457 IPCs
Killing 2 Fgs: 1296/46656= 2.778%+20 IPCs = + 0.556 IPC
Killing 1 Fg: 12960/46656= 27.778% +10 IPCs = + 2.778 IPCs
2 StBs killed: 9216/46656= 19.753%-24 IPCs = - 4.741 IPCs
1 StB killed: 23040/46656= 49.383%-12 IPCs = - 5.926 IPCs

Sum: +9.445 - 10.667 = - 1.222 IPCs damage/SBR run                                    Sum: +11.112 - 10.667 = + 0.445 IPCs damage/SBR run

G40 HR: 1 StB & 1 Fg A1 doing SBR against 1 intercepting Fgs D2

StB+Fg rolls/interceptors Fgs roll/ AAA roll = odds casualties

11/362/61/6= 22/1296 1 Fg killed and 1 StB killed by AAA vs 1 Fg
11/362/65/6= 110/1296 1 Fg killed vs 1 Fg
11/364/61/6= 44/1296 1 StB killed by AAA vs 1 Fg
11/364/65/6 = 220/1296 no casualty vs 1 Fg

25/362/61/6 = 50/1296 1 Fg and 1 StB killed by AAA vs no casualty
25/362/65/6 = 250/1296 1 Fg vs no casualty
25/364/61/6 = 100/1296 1 StB killed by AAA vs no casualty
25/364/65/6 = 500/1296 no casualty at all

Results:
Bombard on IC: 1080/1296 = 83.333% * ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 4.583 IPCs                              / +7 IPCs = + 5.833 IPCs
Killing 1 Fg: 396/1296 = 30.556% +10 IPCs = + 3.056 IPCs
Fg killed: 360/1296 = 27.778%-10 IPCs = - 2.778 IPCs
StB killed: 144/1296 = 11.111%-12 IPCs = - 1.333 IPCs
StB & Fg killed: 72/1296 = 5.556%-22 IPCs = - 1.222 IPCs

Sum: + 7.639 - 5.333 = + 2.306 IPCs damage/SBR run                                    Sum: + 8.889 - 5.333 = + 3.556 IPCs damage/SBR run

G40 SBR HR: 2 StBs A1 regular doing SBR against 1 intercepting Fgs D2

StBs rolls/interceptors Fgs roll/ AAA roll = odds casualties

11/362/66/36 = 132/7776 1 StB killed by Fg and 1 StB killed by AAA vs 1 Fg
11/362/630/36 = 660/7776 1 StB killed by Fg vs 1 Fg
11/364/61/36 = 44/7776 2 StBs killed by AAA vs 1 Fg
11/364/610/36 = 440/7776 1 StB killed by AAA vs 1 Fg
11/364/625/36 = 1100/7776 no casualty vs 1 Fg

25/362/66/36 = 300/7776 1 StB killed by Fg and 1 StB killed by AAA vs no casualty
25/362/630/36 = 1500/7776 1 StBs killed by Fg vs no casualty
25/364/61/36 = 100/7776 2 StBs killed by AAA vs no casualty
25/364/610/36 = 1000/7776 1 StB killed by AAA vs no casualty
25/364/625/36 = 2500/7776 no casualty at all

Results:
2x Bombard on IC: 3600/7776= 46.296% * ((6+16) IPCs)/2= +11 IPCs) = + 5.093 IPCs                                / +14 IPCs= + 6.481 IPCs
1x Bombard on IC: 3600/7776= 46.296% * ((3+8) IPCs)/2= +5.5 IPCs) = + 2.546 IPCs                                  / +7 IPCs = + 3.241 IPCs
Killing 1 Fg: 2332/7776= 29.999% +10 IPCs = + 3.00 IPCs
2 StBs killed: 576/7776= 7.407%-24 IPCs = - 1.778 IPCs
1 StB killed: 3600/7776= 46.296%*-12 IPCs = - 5.556 IPCs

Sum: +10.639 - 7.334 = + 3.304 IPCs damage/SBR run                                  Sum: +12.722 - 7.334 = + 5.388 IPCs damage/SBR run

1942.2 SBR House Rules :
1 StB doing SBR without interceptor, damage 1D6+2
Sum: + 4.583 - 2 = +2.583 IPCs damage/SBR run

1 StB A1 regular vs 1 Fg D2
Sum: + 4.723 - 5.333 = - 0.61 IPC. damage/SBR run

1 StB A1 regular doing SBR against 2 intercepting Fgs D2
Sum: +3.704 - 7.556 = - 3.852 IPCs damage/SBR run

1 StB & 1 Fg A1 first strike (due to combined arms with Fg escort) doing SBR against 2 intercepting Fgs D2
Sum: + 7.554 - 7.564 = - 0.01 IPC damage/SBR run

2 StBs A1 regular doing SBR against 2 intercepting Fgs D2
Sum: +9.445 - 10.667 = - 1.222 IPCs damage/SBR run

1 StB & 1 Fg A1 first strike (due to combined arms with Fg escort) doing SBR against 1 intercepting Fg D2
Sum: + 7.639 - 5.159 = + 2.48 IPCs damage/SBR run

2 StBs A1 regular doing SBR against 1 intercepting Fg D2
Sum: +10.639 - 7.334 = + 3.304 IPCs damage/SBR run

Strategic Bomber in air-to-air combat SBR:
Attack 1
Bombard IC or AB or NB damage: 2D6

Fighter in air-to-air combat SBR:
Attack 2
Defend 2

Tactical Bomber in air-to-air combat SBR:
Attack 1
Bombard AB or NB damage: 1D6

IC’s AAA: @1 against each Strategic Bomber
Naval Base or Air Base: @1 against each Strategic Bomber or Tactical bomber

Global 1940 SBR HRules SBR damage 1D6+2 / Interceptor Def @2

Global40 SBR HRules : 1 StB doing SBR without interceptor, damage 1D6+2            / HR SBR = Damage 2D6 (avg 7 IPCs)
1D6+2: + 4.583 - 2 = +2.583 IPCs damage/SBR run                                                   2D6: + 5.833 - 2 = +3.833 IPCs damage/SBR run

G40 SBR HRules :1 StB A1 regular vs 1 Fg D2
1D6+2: + 4.723 - 5.333 = - 0.61 IPC. damage/SBR                                                2D6: + 5.556 - 5.333 = + 0.223 IPC. damage/SBR

G40 SBR HR: 1 StB A1 regular doing SBR against 2 intercepting Fgs D2
1D6+2: +3.704- 7.556 = - 3.852 IPCs damage/SBR                                                 2D6: +4.260- 7.556 = - 3.296 IPCs damage/SBR

G40 SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 2 intercepting Fgs D2
1D6+2: + 9.074 - 8.667 = + 0.407 IPC damage/SBR                                              2D6: + 10.185 - 8.667 = + 1.518 IPC damage/SBR

G40 SBR HR: 2 StBs A1 regular doing SBR against 2 intercepting Fgs D2
1D6+2: +9.445 - 10.667 = - 1.222 IPCs damage/SBR                                             2D6: +11.112 - 10.667 = + 0.445 IPCs damage/SBR

G40 HR: 1 StB A1 & 1 Fg A2 doing SBR against 1 intercepting Fgs D2
1D6+2: + 9.027 - 5.333 = + 3.694 IPCs damage/SBR                                             2D6: + 10.277 - 5.333 = + 4.944 IPCs damage/SBR

G40 SBR HR: 2 StBs A1 regular doing SBR against 1 intercepting Fgs D2
1D6+2: +10.639 - 7.334 = + 3.304 IPCs damage/SBR                                              2D6: +12.722 - 7.334 = + 5.388 IPCs damage/SBR

Here is some maths evaluation to compare with other actual rules (provided in the above quote) :

Global40 SBR HRules : 1 StB doing SBR without interceptor, damage 1D6+2  / damage 2D6
Regular SBRs                                              /  with special HR bonus damage to IC when StB is killed by IC’s AAA
5/6 StB survived *3.5 IPCs = +2.917 IPCs    /+1 IPC = +0.167 IPC
5/6 StB survived *4.5 IPCs = +3.75 IPCs      /+1 IPC = +0.167 IPC
5/6 StB survived *5.5 IPCs = +4.583 IPCs   /+2 IPCs = +0.333 IPC
5/6 StB survived *6.5 IPCs = +5.417 IPCs   /+3 IPCs = +0.500 IPC
5/6 StB survived *7.0 IPCs = + 5.833 IPCs     /+3 IPCs = +0.500 IPC
1/6 StB killed *12 IPCs = -2 IPCs

Regular SBRs                                                               /  with special HR bonus damage to IC when StB is killed by IC’s AAA
1D6 (avg 3.5 IPCs): +2.917 - 2 = +0.917 IPCs damage/SBR     / +1.084 IPCs damage/SBR
1D6+1 (avg 4.5 IPCs): +3.750 - 2 = +1.750 IPCs damage/SBR   / +1.917 IPCs damage/SBR
1D6+2 (avg 5.5 IPCs): +4.583 - 2 = +2.583 IPCs damage/SBR  / +2.916 IPCs damage/SBR
1D6+3 (avg 6.5 IPCs): +5.417 - 2 = +3.417 IPCs damage/SBR  / +3.917 IPCs damage/SBR
2D6 (avg 7 IPCs): +5.833 - 2 = +3.833 IPCs damage/SBR      / +4.333 IPCs damage/SBR

G40 SBR HRules :1 StB A1 regular vs 1 Fg D2

StB roll /Fg roll / AAA roll = odds casualties

1/62/66/6= 12/216 1 StB killed by AAA vs 1 Fg killed: 5.556%
1/64/61/6= 4/216 1 StB killed by AAA vs 1 Fg killed: 1.852%
1/64/65/6= 20/216 no casualty vs 1 Fg killed: 9.259%

5/62/66/6= 60/216 StB killed by Fg: 27.778%
5/64/61/6= 20/216 StB killed by AAA: 9.259%
5/64/65/6= 100/216 both survived: 46.296%

Results:
Bombard on IC 120/216= 55.556% * ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 3.056 IPCs
killing Fg 36/216= 16.667% *+10 IPC = + 1.667 IPC
StB killed 96/216= 44.444% *-12 IPCs = - 5.333 IPCs
                              / Damage by StB killed by AAA: 24/216 = 11.111% * x =
*3.5 IPCs = +1.944 /  +1 IPC = +0.111 IPC
*4.5 IPCs = +2.500 /  +1 IPC = +0.111 IPC
*5.5 IPCs = +3.056 /  +2 IPCs = +0.222 IPC
*6.5 IPCs = +3.611 /  +3 IPCs = +0.333 IPC
*7.0 IPCs = +3.889 /  +3 IPCs = +0.333 IPC

Regular SBRs                                                               /  with special HR bonus damage to IC when StB is killed by IC’s AAA
1D6: +3.611 - 5.333 = -1.722 IPCs damage/SBR      / -1.611 IPCs damage/SBR
1D6+1: +3.75 - 5.333 = -1.583 IPCs damage/SBR    / -1.472 IPCs damage/SBR
1D6+2: +4.723 - 5.333 = -0.61 IPC damage/SBR  / -0.388 IPCs damage/SBR
1D6+3: +5.278 - 5.333 = -0.055 IPCs damage/SBR  / +0.278 IPCs damage/SBR
2D6: +5.556 - 5.333 = +0.223 IPC damage/SBR  / +0.556 IPCs damage/SBR

G40 SBR HR: 1 StB A1 regular doing SBR against 2 intercepting Fgs D2

StBs rolls/interceptors Fgs roll/ AAA roll = odds casualties

1/620/366/6 = 120/1296 1 StB killed by Fg vs 1 Fg
1/616/361/6= 16/1296 1 StB killed by AAA vs 1 Fg
1/616/365/6 = 80/1296 no casualty vs 1 Fg

5/620/366/6 = 600/1296 1 StB killed by Fg vs no casualty
5/616/361/6 = 80/1296 1 StB killed by AAA vs no casualty
5/616/365/6 = 400/1296 no casualty at all

Results:
Bombard on IC: 480/1296= 37.037% * ((3+8) IPCs)/2= +5.5 IPCs) = +2.037 IPCs
Killing 1 Fg: 216/1296= 16.667% +10 IPCs = + 1.667 IPCs
1 StB killed: 816/1296= 62.963%-12 IPCs = - 7.556 IPCs
          / Damage by StB killed by AAA: 96/1296 = + 7.407% * x =
*3.5 IPCs = +1.296  /  +1 IPC = +0.074 IPC
*4.5 IPCs = +1.667  /  +1 IPC = +0.074 IPC
*5.5 IPCs = +2.037  /  +2 IPCs = +0.148 IPC
*6.5 IPCs = +2.407  /  +3 IPCs = +0.222 IPC
*7.0 IPCs = +2.593  /  +3 IPCs = +0.222 IPC

Regular SBRs                                                               /  with special HR bonus damage to IC when StB is killed by IC’s AAA
1D6: +2.963 - 7.556 = -4.593 IPCs damage/SBR      / -4.519 IPCs damage/SBR
1D6+1: +3.334 - 7.556 = -4.222 IPCs damage/SBR    / -4.148 IPCs damage/SBR
1D6+2: +3.704 - 7.556 = -3.852 IPCs damage/SBR  / -3.704 IPCs damage/SBR
1D6+3: +4.074 - 7.556 = -3.482 IPCs damage/SBR  / -3.260 IPCs damage/SBR
2D6: +4.260 - 7.556 = -3.296 IPCs damage/SBR  / -3.074 IPCs damage/SBR

G40 SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 2 intercepting Fgs D2

StB+Fg rolls/interceptors Fgs roll/ AAA roll = odds casualties
2/364/366/6 = 48/7776 1 Fg and 1 StB killed by Fgs vs 2 Fgs
2/3616/361/6 = 32/7776 1 Fg killed and 1 StB killed by AAA vs 2 Fgs
2/3616/365/6 = 160/7776 1 Fg killed vs 2 Fgs
2/3616/361/6 = 32/7776 1 StB killed by AAA vs 2 Fgs
2/3616/365/6 = 160/7776 no casualty vs 2 Fgs

14/364/366/6 = 336/7776 1 Fg and 1 StB killed by Fgs vs 1 Fg
14/3616/361/6 = 224/7776 1 Fg and 1 StB killed by AAA vs 1 Fg
14/3616/365/6 = 1120/7776 1 Fg vs 1 Fg
14/3616/361/6= 224/7776 1 StB killed by AAA vs 1 Fg
14/3616/365/6 = 1120/7776 no casualty vs 1 Fg

20/364/366/6 = 480/7776 1 Fg and 1 StB killed by Fg vs no casualty
20/3616/361/6 = 320/7776 1 Fg and 1 StB killed by AAA vs no casualty
20/3616/365/6 = 1600/7776 1 Fg vs no casualty
20/3616/361/6 = 320/7776 1 StB killed by AAA vs no casualty
20/3616/365/6 = 1600/7776 no casualty at all

Results:
Bombard on IC: 5760/7776= 74.074%* ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 4.074 IPCs
Killing 2 Fgs: 432/7776= 2.778%+20 IPCs = + 1.111 IPC
Killing 1 Fg: 3024/7776= 27.778% +10 IPCs = + 3.889 IPCs
Fg killed: 2880/7776= 37.04%-10 IPCs = - 3.704 IPCs
StB killed: 576/7776= 7.41%-12 IPCs = - 0.889 IPCs
StB & Fg killed: 1440/7776=18.52%*-22 IPCs = - 4.074 IPCs

/ Damage by 1 StB killed by AAA: 1152/7776 = + 14.815% * x =
*3.5 IPCs = +2.593  /  +1 IPC = +0.148 IPC
*4.5 IPCs = +3.333  /  +1 IPC = +0.148 IPC
*5.5 IPCs = +4.074  /  +2 IPCs = +0.296 IPC
*6.5 IPCs = +4.815  /  +3 IPCs = +0.444 IPC
*7.0 IPCs = +5.185  /  +3 IPCs = +0.444 IPC

Regular SBRs                                                               /  with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +7.593 - 8.667 = -1.074 IPCs damage/SBR      / -0.926 IPC damage/SBR
1D6+1: +8.333 - 8.667 = -0.334 IPC damage/SBR    / -0.186 IPCs damage/SBR
1D6+2: +9.074 - 8.667 = +0.407 IPC damage/SBR  / +0.703 IPC damage/SBR
1D6+3: +9.815 - 8.667 = +1.148 IPCs damage/SBR  / +1.592 IPCs damage/SBR
2D6: +10.185 - 8.667 = +1.518 IPCs damage/SBR  / +1.962 IPCs damage/SBR

G40 SBR HR: 2 StBs A1 regular doing SBR against 2 intercepting Fgs D2

StBs rolls/interceptors Fgs roll/ AAA roll = odds casualties

1/364/3636/36 = 144/46656 2 StBs killed by Fg vs 2 Fgs: 0.309%
1/3616/366/36 = 96/46656 1 StB killed by Fg and 1 StB killed by AAA vs 2 Fgs : 0.206%
1/3616/3630/36 = 480/46656 1 StB killed by Fg vs 2 Fgs : 1.029%
1/3616/361/36 = 16/46656 2 StBs killed by AAA vs 2 Fgs : 0.034%
1/3616/3610/36 = 160/46656 1 StB killed by AAA vs 2 Fgs : 0.343%
1/3616/3625/36 = 400/46656 no casualty vs 2 Fgs : 0.857%

10/364/3636/36 = 1440/46656 2 StBs killed by Fg vs 1 Fg: 3.086%
10/3616/366/36 = 960/46656 1 StB killed by Fg and 1 StB killed by AAA vs 1 Fg : 2.058%
10/3616/3630/36 = 4800/46656 1 StB killed by Fg vs 1 Fg : 10.288%
10/3616/361/36= 160/46656 2 StBs killed by AAA vs 1 Fg : 0.343%
10/3616/3610/36= 1600/46656 1 StB killed by AAA vs 1 Fg : 3.429%
10/3616/3625/36 = 4000/46656 no casualty vs 1 Fg : 8.573%

25/364/3636/36 = 3600/46656 2 StBs killed by Fg vs no casualty : 7.716%
25/3616/366/36 = 2400/46656 1 StB killed by Fg and 1 StB killed by AAA vs no casualty : 5.144%
25/3616/3630/36 = 12000/46656 1 StBs killed by Fg vs no casualty : 25.72%
25/3616/361/36 = 400/46656 2 StBs killed by AAA vs no casualty : 0.857%
25/3616/3610/36 = 4000/46656 1 StB killed by AAA vs no casualty : 8.573%
25/3616/3625/36 = 10000/46656 no casualty at all : 21.433%

Results:
2x Bombard on IC: 14400/46656= 30.864% * ((6+16) IPCs)/2= +11 IPCs) = + 3.395 IPCs                            / +14 IPCs= + 4.321 IPCs
1x Bombard on IC: 23040/46656= 49.383% * ((3+8) IPCs)/2= +5.5 IPCs) = +2.716 IPCs                             / +7 IPCs = + 3.457 IPCs
Killing 2 Fgs: 1296/46656= 2.778%+20 IPCs = + 0.556 IPC
Killing 1 Fg: 12960/46656= 27.778% +10 IPCs = + 2.778 IPCs
2 StBs killed: 9216/46656= 19.753%-24 IPCs = - 4.741 IPCs
1 StB killed: 23040/46656= 49.383%-12 IPCs = - 5.926 IPCs
        / Damage by 1 StB killed by AAA: 9216/46656 = + 19.753% * 1x = 2 StBs killed by AAA: 576/46656 = + 1.235% * 2x =
*+7/+3.5 IPCs = +2.160  /+1.728 /  +1 IPC = +0.198  / +0.025 IPC
*+9/+4.5 IPCs = +2.778  / +2.222 / +1 IPC = +0.198 / +0.025 IPC
*+11/+5.5 IPCs = +3.395 / +2.716  /  +2 IPCs = +0.396  / +0.049 IPC
*+13/+6.5 IPCs = +4.012  /  +3.210 /+3 IPCs = +0.594 / +0.074 IPC
*+14/+7.0 IPCs = +4.321 / +3.457   /  +3 IPCs = +0.594 / +0.074 IPC

Regular SBRs                                                               /  with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +7.222 - 10.667 = -3.445 IPCs damage/SBR      / -3.222 IPCs damage/SBR
1D6+1: +8.334 - 10.667 = -2.333 IPC damage/SBR    / -2.110 IPCs damage/SBR
1D6+2: +9.445 - 10.667 = -1.222 IPCs damage/SBR  / -0.336 IPC damage/SBR
1D6+3: +10.556 - 10.667 = -0.111 IPC damage/SBR  / +0.557 IPCs damage/SBR
2D6: +11.112 - 10.667 = +0.445 IPC damage/SBR  / +1.113 IPCs damage/SBR

G40 HR: 1 StB A1 & 1 Fg A2 doing SBR against 1 intercepting Fgs D2

StB+Fg rolls/interceptors Fgs roll/ AAA roll = odds casualties

16/362/61/6= 32/1296 1 Fg killed and 1 StB killed by AAA vs 1 Fg
16/362/65/6= 160/1296 1 Fg killed vs 1 Fg
16/364/61/6= 64/1296 1 StB killed by AAA vs 1 Fg
16/364/65/6 = 320/1296 no casualty vs 1 Fg

20/362/61/6 = 40/1296 1 Fg and 1 StB killed by AAA vs no casualty
20/362/65/6 = 200/1296 1 Fg vs no casualty
20/364/61/6 = 80/1296 1 StB killed by AAA vs no casualty
20/364/65/6 = 400/1296 no casualty at all

Results:
Bombard on IC: 1080/1296 = 83.333% * ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 4.583 IPCs
Killing 1 Fg: 576/1296 = 44.444% +10 IPCs = + 4.444 IPCs
Fg killed: 360/1296 = 27.778%-10 IPCs = - 2.778 IPCs
StB killed: 144/1296 = 11.111%-12 IPCs = - 1.333 IPCs
StB & Fg killed: 72/1296 = 5.556%-22 IPCs = - 1.222 IPCs
                        / Damage by 1 StB killed by AAA: 216/1296 = + 16.667% * x =
*3.5 IPCs = +2.917  /  +1 IPC = +0.167 IPC
*4.5 IPCs = +3.750  /  +1 IPC = +0.167 IPC
*5.5 IPCs = +4.583  /  +2 IPCs = +0.333 IPC
*6.5 IPCs = +5.417  /  +3 IPCs = +0.500 IPC
*7.0 IPCs = +5.833  /  +3 IPCs = +0.500 IPC

Regular SBRs                                                                /  with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +7.361 - 5.333 = +2.028 IPCs damage/SBR      / +2.195 IPCs damage/SBR
1D6+1: +8.194 - 5.333 = +2.861 IPCs damage/SBR    / +3.028 IPCs damage/SBR
1D6+2: +9.027 - 5.333 = +3.694 IPCs damage/SBR  / +4.027 IPCs damage/SBR
1D6+3: +9.861 - 5.333 = +4.528 IPCs damage/SBR  / +5.028 IPCs damage/SBR
2D6: +10.277 - 5.333 = +4.944 IPCs damage/SBR  / +5.444 IPCs damage/SBR

G40 SBR HR: 2 StBs A1 regular doing SBR against 1 intercepting Fgs D2

StBs rolls/interceptors Fgs roll/ AAA roll = odds casualties

11/362/66/36 = 132/7776 1 StB killed by Fg and 1 StB killed by AAA vs 1 Fg
11/362/630/36 = 660/7776 1 StB killed by Fg vs 1 Fg
11/364/61/36 = 44/7776 2 StBs killed by AAA vs 1 Fg
11/364/610/36 = 440/7776 1 StB killed by AAA vs 1 Fg
11/364/625/36 = 1100/7776 no casualty vs 1 Fg

25/362/66/36 = 300/7776 1 StB killed by Fg and 1 StB killed by AAA vs no casualty
25/362/630/36 = 1500/7776 1 StBs killed by Fg vs no casualty
25/364/61/36 = 100/7776 2 StBs killed by AAA vs no casualty
25/364/610/36 = 1000/7776 1 StB killed by AAA vs no casualty
25/364/625/36 = 2500/7776 no casualty at all

Results:
2x Bombard on IC: 3600/7776= 46.296% * ((6+16) IPCs)/2= +11 IPCs) = + 5.093 IPCs                 / +14 IPCs= + 6.481 IPCs
1x Bombard on IC: 3600/7776= 46.296% * ((3+8) IPCs)/2= +5.5 IPCs) = + 2.546 IPCs                 / +7 IPCs = + 3.241 IPCs
Killing 1 Fg: 2332/7776= 29.999% +10 IPCs = + 3.00 IPCs
2 StBs killed: 576/7776= 7.407%-24 IPCs = - 1.778 IPCs
1 StB killed: 3600/7776= 46.296%*-12 IPCs = - 5.556 IPCs
   / Damage by 1 StB killed by AAA: 1872/7776 = + 24.074% * 1x = /    2 StBs killed by AAA: 144/7776 = + 1.852% * 2x =
*+7/+3.5 IPCs = +3.241  /+1.620 /  +1 IPC = +0.241  / +0.037 IPC
*+9/+4.5 IPCs = +4.167  / +2.083 / +1 IPC = +0.241 / +0.037 IPC
*+11/+5.5 IPCs = +5.093 / +2.546  /  +2 IPCs = +0.482  / +0.074 IPC
*+13/+6.5 IPCs = +6.019  /  +3.009 /+3 IPCs = +0.722 / +0.111 IPC
*+14/+7.0 IPCs = +6.481 / +3.241   /  +3 IPCs = +0.722 / +0.111 IPC

Regular SBRs                                                            /  with special HR bonus damage to IC when 1 or 2 StBs are killed by IC’s AAA
1D6: +7.861 - 7.334 = +0.527 IPCs damage/SBR      / +0.805 IPCs damage/SBR
1D6+1: +9.250 - 7.334 = +1.916 IPCs damage/SBR    / +2.194 IPCs damage/SBR
1D6+2: +10.639 - 7.334 = +3.304 IPCs damage/SBR  / +3.860 IPCs damage/SBR
1D6+3: +12.028 - 7.334 = +4.694 IPCs damage/SBR  / +5.527 IPCs damage/SBR
2D6: +12.722 - 7.334 = +5.388 IPCs damage/SBR  / +6.221 IPCs damage/SBR

SBR HRules : 2 StBs doing SBR without interceptor
Regular SBRs                                                               /  with special HR bonus damage to IC when 1 or 2 STBs are killed by IC’s AAA
1D6 (avg 3.5 IPCs): +5.834 - 4 = +1.834 IPCs damage/SBR     / +2.168 IPCs damage/SBR
1D6+1 (avg 4.5 IPCs): +7.500 - 4 = +3.500 IPCs damage/SBR   / +3.834 IPCs damage/SBR
1D6+2 (avg 5.5 IPCs): +9.166 - 4 = +5.166 IPCs damage/SBR  / +5.832 IPCs damage/SBR
1D6+3 (avg 6.5 IPCs): +10.834 - 4 = +6.834 IPCs damage/SBR  / +7.834 IPCs damage/SBR
2D6 (avg 7 IPCs): +11.666 - 4 = +7.666 IPCs damage/SBR      / +8.666 IPCs damage/SBR

@Baron:

@barney:

Basically I never intercept. If Bombers were 0 and Fighters 1 then it would at least force the attacker to send more escorts, or maybe not force but encourage. IDK. I still like the idea of a scrambled fighter reducing a bombers dice roll by two on a 1:1 basis to encourage scrambling. Right now why do it unless you have the advantage?

@Gargantua:

Yeah, the bombers at 1 really sucks - they should be 0.

Unless I have some advantage in numbers, it seems like intercepting is only giving the attacker more opportunity to damage your force where it counts.

But it all depends on what’s going on in game… and if scrambling that fighter could mean allowing the Russians to place more units - maybe you do it.  High risk game of Russian roulette.

@wittmann:

Afternoon Baron.
I would never intercept, if I had fewer planes than the attacker, unless he had no Fts in the battle and I could afford to lose (could replace) my losses.
As the agressor, I would also ensure I had a Ft to lose, if the defender had Fts which could intercept and would like 2 or 3 more planes than him.
As a rule, I don’t intercept, as the attacker can usually accompany his Bombers, with the canon fodder Fighters.
The new rules make it  a raw deal for the defender. I do not like the change from Anniversary and 42, which saw the 2 in defence become a measly 1 in 1940.

Hi, everyone.
A deeper question for all of you:
would you intercept or make a SBR on 1:1 ratio, if the following values were applied?
Or is this a major deterrent from the attacker POV?

Defending interceptors get first strike @1 and always hit Bombers first, whether Tactical or Strategic (owner’s choice).
If intercepting, the Defender can also bring into combat his AAA units within the TT, each defend @1 against up to 1 plane.

Strategic Bomber in air-to-air combat SBR:
Attack 1
Bombard IC or AB or NB damage: 1D6+2

Fighter in air-to-air combat SBR:
Attack 1 First Strike
Defend 1 First Strike
Always hit Bombers first, whether Tactical or Strategic (owner’s choice).

Tactical Bomber in air-to-air combat SBR:
Attack 1
Bombard AB or NB damage: 1D6

It should be assumed that Tactical bombers can do escorting mission besides Strategic bombers, even when there is no Air Base or Naval Base.

Anti-Aircraft Artillery
Defense: 1 per unit and up to max 1 per enemy’s plane.
All Anti-Aircraft Artillery within the TT get 1@1 up to maximum of 1 defense roll per each attacking aircraft.
Planes’ casualties are the owner’s choice.
AAA unit can be chosen as casualty, if all defending interceptors are already taken as casualties.
If the territory is also under a regular attack, surviving AAA units can also be used against other airplanes, working as per OOB rules.

IC’s AA gun: @1 against each Strategic Bomber
Naval Base or Air Base’s AA gun: @1 against each Strategic Bomber or Tactical bomber

G40.2 SBR HR
Bomber A1 Damage: 1D6+2

Fighter A1 First Strike D1 First Strike

I’m looking for a balance but more historical way of doing G40 SBR.

1. The first thing I got in mind was to simply give all Fgs a preemptive first strike A/D @1.
   All Tactical and Strategical bomber keep a regular A1.

Would it be still balance and a good incentive for defender to intercept if the bombers are always the first hit amongst attacking planes?

Summary:

G1940 HR SBR with Fg A1 first strike D@1 first strike:
1 StB doing SBR without interceptor
Sum: 4.583 - 2 = +2.583 IPCs damage/StB

1 StB A1 against 1 Fg D1 first strike
Sum: + 5.208 - 3.667 = + 1.541 IPC damage/SBR run

1 StB A1 against 2 Fgs D1 first strike
Sum: + 4.340 - 5.056 = - 0.716 IPC damage/SBR run

1 StB A1 & 1 Fgs A1 first strike doing SBR against 2 intercepting Fg D1 first strike which always target bomber first
Sum: + 6.505 - 5.383= + 1.122 IPCs damage/SBR run

2 StB A1 against 2 Fgs D1 first strike
Sum: + 10.417 - 7.334 = + 3.083 IPCs damage/SBR run

1 StB A1 & 1 Fg A1 first strike doing SBR against 1 intercepting Fg D1 first strike which always target bomber first
Sum: + 6.875 - 3.667 = + 3.208 IPCs damage/SBR run

2 StB A1 against 1 Fg D1 first strike
Sum: + 11.227 - 5.666 = + 5.561 IPCs damage/SBR run

To get any conclusion about them, I must first make some stats table.

G1940 SBR with Fg A/D@1 first strike which always target bomber first:
1 StB doing SBR without interceptor
5/6 StB survived * 5.5 IPCs = 4.583 IPCs
1/6 StB killed *12 IPCs = -2 IPCs

Sum: 4.583 - 2 = +2.583 IPCs damage/StB

1 StB A1 against 1 Fg D1 first strike

StB roll / Fg roll / AAA roll = odds casualties

116= 6/216 1 StB killed by Fg vs no casualty
151= 5/216 1 StB killed by AAA vs 1 Fg killed
155= 25/216 no casualty vs 1 Fg killed

516= 30/216 StB killed by Fg
551= 25/216 StB killed by AAA
555= 125/216 both survived

Results:
Bombard IC: 150/216= 69.444% * ((1+2)+(6+2)/2) IPCs= + 5.5 IPCs) = 3.819 IPCs
killing Fg: 30/216= 13.889% *+10 IPCs = + 1.389 IPC
StB killed: 66/216= 30.556% *-12 IPCs = - 3.667 IPCs

Sum: + 5.208 - 3.667 = + 1.541 IPC damage/SBR run

---

1 StB A1 against 2 Fgs D1 first strike

StB roll / Fg roll / AAA roll = odds casualties

1116= 66/216 1 StB killed by Fg vs no casualty
1251= 25/216 1 StB killed by AAA vs 1 Fg killed
1255= 125/216 no casualty vs 1 Fg killed

5116= 330/216 StB killed by Fg
5251= 125/216 StB killed by AAA
5255= 625/216 both survived

Results:
Bombard IC: 750/1296= 57.87% * ((1+2)+(6+2)/2) IPCs= + 5.5 IPCs) = + 3.183 IPCs
killing 1 Fg: 150/1296= 11.574% *+10 IPCs = + 1.157 IPC
StB killed: 546/1296= 42.150% *-12 IPCs = - 5.056IPCs

Sum: + 4.340 - 5.056 = - 0.716 IPC damage/SBR run

1 StB A1 & 1 Fgs A1 first strike doing SBR against 2 intercepting Fg D1 first strike which always target bomber first

Interceptors Fgs roll/ StB+Fg rolls/ AAA roll = odds casualties

1/366/366/6 = 36/7776 1 Fg and 1 StB killed by Fgs vs 1 Fg
1/3630/366/6 = 180/7776 1 Fg and 1 StB killed by Fgs vs no casualty

10/361/366/6 = 60/7776  1 StB killed by Fgs vs 2 Fgs
10/3610/366/6 = 600/7776  1 StB killed by Fgs vs 1 Fg
10/3625/366/6 = 1500/7776  1 StB killed by Fgs vs no casualty

25/361/361/6 = 25/7776 1 StB killed by AAA vs 2 Fgs
25/361/365/6 = 125/7776 no casualty vs 2 Fgs
25/3610/361/6 = 250/7776 1 StB killed by AAA vs 1 Fg
25/3610/365/6 = 1250/7776 no casualty vs 1 Fg
25/3625/361/6 = 625/7776 1 StB killed by AAA vs no casualty
25/3625/365/6 = 3125/7776 no casualty at all

Results:
Bombard on IC: 4550/7776 = 58.51% * ((3+8) IPCs)/2= +5.5 IPCs) = + 3.218 IPCs
Killing 1 Fg: 2136/7776 = 27.469%* +10 IPCs = + 2.747 IPCs
Killing 2 Fgs: 210/7776= 2.701* +20 IPCs = + 0.540 IPC
StB killed: 3060/7776 = 39.352%-12 IPCs = - 4.722 IPCs
StB & Fg killed: 216/7776 = 2.778%-22 IPCs = - 0.611 IPCs

Sum: + 6.505 - 5.383= + 1.122 IPCs damage/SBR run

1 StB A1 & 1 Fg A1 first strike doing SBR against 1 intercepting Fg D1 first strike which always target bomber first

StB+Fg rolls/interceptors Fgs roll/ AAA roll = odds casualties

11/361/66/6 = 66/1296 1 StB  vs 1 Fg
11/365/61/6 = 55/1296 1 StB killed by AAA vs 1 Fg
11/365/65/6 = 275/1296 no casualty vs 1 Fg

25/361/66/6 = 150/1296 1 StB vs no casualty
25/365/61/6 = 125/1296 1 StB killed by AAA vs no casualty
25/365/65/6 = 625/1296 no casualty at all

Results:
Bombard on IC: 900/1296 = 69.444% * ((3+8) IPCs)/2= +5.5 IPCs) = + 3.819 IPCs
Killing 1 Fg: 396/1296 = 30.556%* +10 IPCs = + 3.056 IPCs
StB killed: 396/1296 = 30.556%*-12 IPCs = - 3.667 IPCs

Sum: + 6.875 - 3.667 = + 3.208 IPCs damage/SBR run

---

G40 HR Fg A1 regular D1 first strike 1 StB & 1 Fg A1 regular doing SBR against 1 intercepting Fg D1 first strike

interceptor Fg roll / Fg roll/ StB roll/ AAA roll = odds casualties

1611 = 6/1296 1 Fg killed and 1 StB killed by AAA vs 1 Fg
1615 = 30/1296 1 Fg killed vs 1 Fg
1651 = 30/1296 1 Fg killed and 1 StB killed by AAA vs no casualty
1655 = 150/1296 1 Fg killed vs no casualty

5161 = 30/1296 1 StB killed by AAA vs 1 Fg
5165 = 150/1296 no casualty vs 1 Fg
5511 = 25/1296 1 StB killed by AAA vs 1 Fg
5515 = 125/1296 no casualty vs 1 Fg
5551 = 125/1296 1 StB killed by AAA vs no casualty
5555 = 625/1296 no casualty at all

Results:
Bombard on IC: 1080/1296 = 83.333% * ((3+8) IPCs)/2= +5.5 IPCs) = + 4.583 IPCs
Killing 1 Fg: 366/1296 = 28.241%* +10 IPCs = + 2.824 IPCs
Fg killed: 180/1296 = 13.889%* -10 IPCs = - 1.389 IPCs
StB killed: 180/1296 = 13.889%-12 IPCs = - 1.667 IPCs
StB & Fg killed: 36/1296 = 2.778%-22 IPCs = - 0.611 IPCs

Sum: + 7.407 - 3.667 = + 3.740 IPCs damage/SBR run

2 StB A1 against 2 Fgs D1 first strike

Fg roll / StBs roll / AAA roll = odds casualties

1/3636/3636/36= 1296/46656 2 StBs killed by Fgs vs no casualty

106/366/36= 360/46656 1 StB killed by Fg and 1 StB by AAA vs 1 Fg killed
106/3630/36= 1800/46656 1 StB killed by Fg vs 1 Fg killed
1030/366/36= 1800/46656 1 StB killed by Fg and 1 StB by AAA vs no casualty
1030/3630/36= 9000/46656 1 StB killed by Fg vs no casualty

251/361= 25/46656 2 StBs killed by AAA vs 2 Fgs
251/3610= 250/46656 1 StB killed by AAA vs 2 Fgs
251/3625= 625/46656 both survived vs 2 Fgs
2510/361= 250/46656 2 StBs killed by AAA vs 1 Fg
2510/3610= 2500/46656 1 StB killed by AAA vs 1 Fg
2510/3625= 6250/46656 both survived vs 1 Fg
2525/361= 625/46656 2 StBs killed by AAA vs no casualty
2525/3610= 6250/46656 1 StB killed by AAA vs no casualty
2525/3625= 15625/46656 no casualty at all

Results:
2x Bombard IC: 22500/46656= 48.225%* ((2+4)+(12+4)/2) IPCs = + 11 IPCs) = + 5.305 IPCs
1x Bombard IC: 19800/46656= 42.438% * ((1+2)+(6+2)/2) IPCs= + 5.5 IPCs) = + 2.334 IPCs
Killing 1 Fg: 11160/46656= 23.920% *+10 IPCs = + 2.392 IPC
Killing 2 Fg: 900/46656= 1.929% * + 20 IPCs = + 0.386 IPCs
1 StB killed: 19800/46656= 42.438% *-12 IPCs = -5.093 IPCs
2 StB killed: 4356/46656 = 9.336% * -24 IPCs = -2.241 IPCs
Sum: + 10.417 - 7.334 = + 3.083 IPCs damage/SBR run

2 StB A1 against 1 Fg D1 first strike

Fg roll / StBs roll / AAA roll = odds casualties

16/366/36= 36/7776 1 StB killed by Fg and 1 StB by AAA vs 1 Fg killed
16/3630/36= 180/7776 1 StB killed by Fg vs 1 Fg killed
130/366/36= 180/7776 1 StB killed by Fg and 1 StB by AAA vs no casualty
130/3630/36= 900/7776 1 StB killed by Fg vs no casualty

511/361= 55/7776 2 StBs killed by AAA vs 1 Fg
511/3610= 550/7776 1 StB killed by AAA vs 1 Fg
511/3625= 1375/7776 both survived vs 1 Fg
525/361= 125/7776 2 StBs killed by AAA vs no casualty
525/3610= 1250/7776 1 StB killed by AAA vs no casualty
525/3625= 3125/7776 no casualty at all

Results:
2x Bombard IC: 4500/7776= 57.870%* ((2+4)+(12+4)/2) IPCs = + 11 IPCs) = + 6.366 IPCs
1x Bombard IC: 2880/7776= 37.037% * ((1+2)+(6+2)/2) IPCs= + 5.5 IPCs) = + 2.037 IPCs
1 killing Fg: 2196/7776= 28.241% *+10 IPCs = + 2.824 IPC
1 StB killed: 2880/7776= 37.037% *-12 IPCs = - 4.444 IPCs
2 StB killed: 396/7776 = 5.093% * -24 IPCs = -1.222 IPCs
Sum: + 11.227 - 5.666 = + 5.561 IPCs damage/SBR run

---

G40 HR Fg A1 reg or first strike D1 first strike: 2 StBs A1 regular doing SBR against 1 intercepting Fgs D1 first strike
With optional limitation rule: in air-to-air combat, bombers cannot get more rolls than the numbers of defending Fgs interceptors.
StBs rolls/interceptors Fgs roll/ AAA roll = odds casualties

Fg roll / StBs roll / AAA roll = odds casualties

11/66/36= 6/7776 1 StB killed by Fg and 1 StB by AAA vs 1 Fg killed
11/630/36=30/7776 1 StB killed by Fg vs 1 Fg killed
15/66/36= 30/7776 1 StB killed by Fg and 1 StB by AAA vs no casualty
15/630/36= 150/7776 1 StB killed by Fg vs no casualty

51/61= 5/7776 2 StBs killed by AAA vs 1 Fg
51/610= 50/7776 1 StB killed by AAA vs 1 Fg
51/625= 125/7776 both survived vs 1 Fg
55/61= 25/7776 2 StBs killed by AAA vs no casualty
55/610= 250/7776 1 StB killed by AAA vs no casualty
55/625= 625/7776 no casualty at all

Results:
2x Bombard IC: 750/1296= 57.870%* ((2+4)+(12+4)/2) IPCs = + 11 IPCs) = + 6.366 IPCs
1x Bombard IC: 480/1296= 37.037% * ((1+2)+(6+2)/2) IPCs= + 5.5 IPCs) = + 2.037 IPCs
1 killing Fg: 216/1296= 16.667% *+10 IPCs = + 1.667 IPC
1 StB killed: 480/1296= 37.037% *-12 IPCs = - 4.444 IPCs
2 StB killed: 66/7776 = 5.093% * -24 IPCs = -1.222 IPCs
Sum: + 10.07 - 5.666 = + 4.404 IPCs damage/SBR run

Comparative summary:
G40 House Rule SBR giving all Fgs @1 first strike compared to G40 OOB SBR all planes @1.

G1940 HR SBR with Fg A/D@1 first strike:
1 StB doing SBR without interceptor
Sum: 4.583 - 2 = +2.583 IPCs damage/SBR run OOB: Sum: +4.583 - 2 = +2.583 IPCs damage/SBR run

1 StB A1 against 1 Fg D1 first strike
Sum: + 5.208 - 3.667 = + 1.541 IPC damage/SBR run  OOB: Sum: + 5.486 - 3.667 = + 1.819 IPC damage/SBR run

1 StB A1 against 2 Fgs D1 first strike
Sum: + 4.340 - 5.056 = - 0.716 IPC damage/SBR run OOB: Sum: + 4.85 - 5.056 = - 0.206 IPCs damage/SBR run

1 StB A1 & 1 Fgs A1 first strike doing SBR against 2 intercepting Fg D1 first strike which always target bomber first
Sum: + 6.505 - 5.383= + 1.122 IPCs damage/SBR run OOB: Sum: +7.775 - 5.33 = + 2.445 IPCs damage/SBR run

2 StB A1 against 2 Fgs D1 first strike
Sum: + 10.417 - 7.334 = + 3.083 IPCs damage/SBR run OOB: Sum: +10.973 - 7.334 = + 3.639 IPCs damage/SBR run

1 StB A1 & 1 Fg A1 first strike doing SBR against 1 intercepting Fg D1 first strike which always target bomber first
Sum: + 6.875 - 3.667 = + 3.208 IPCs damage/SBR run   OOB: Sum: + 7.639 - 3.667 = + 3.972 IPCs damage/SBR run
Sum: + 7.407 - 3.667 = + 3.740 IPCs damage/SBR run Fighter is first casualty.

2 StB A1 against 1 Fg D1 first strike
Sum: + 11.227 - 5.666 = + 5.561 IPCs damage/SBR run OOB: Sum: +11.459 - 5.666 = + 5.793 IPCs damage/SBR run

OK, everyone. I have some really big statements on a truly better SBR, and not so different from the basics OOB game mechanics.
First a few principles about what can make a good incentive to make SBR or to intercept an SBR attack.

1- A massive number of Strategic Bombers with each an attacking factor @1 is a pretty big deterrent for any TT with fewer Fighter defending @1.
This create an historical aberration in which all air defense stay grounded and let the bombers do the destruction over IC, AB and NB.

2- This situation is created by the fact that intercepting bombers is a worse situation than being bombed up to the maximum damage allowance. Loosing Fighters which can be useful on regular defense (@4) while achieving almost nothing to destroy incoming bombers is also a major deterrent.

3- For an optimized play, on statistical POV, a good player should ponder whether intercepting the bombers really lowering their odds of loosing IPCs over the other way of letting Bombers directly under IC’s AA gun fire. So, a player must calculate how many IPCs will be lost on average if he intercepts against how many direct bombing damage can be done against him.

4- To prevent the fear of massive attacking bombers (acting like fighters attacking enemy’s fighters) most of you people assumed that a Strategic bomber with an attack factor @0 is part of the whole solution. (I agree, so I make a lot of table to find the perfect balance in regard to the usual odds of G40 OOB SBR.)
They should be defenseless in dogfight. But with more destructive power.

5- To see if a given SBR mechanics could work, it should also compare the bare SBR value of Bombers raiding without interference and the TUV lost if a given number of Fighter(s) intercept(s) the bomber. To get an incentive mechanics, the defending player must see a real interest to intercept on a mathematical POV.

Here is the basic OOB reference with a single bomber making an OOB G40 SBR without interference:
1 StB doing SBR without interceptor
Sum: +4.583 - 2 = +2.583 IPCs damage/SBR run

In OOB situation, intercepting with a single Fighter gives lesser damage for the defender.
1 StB A1 against 1 Fg D1 damage: 1D6+2
Sum: + 5.486 - 3.667 = + 1.819 IPC damage/SBR run

And when an escort and an additional interceptor are part of the raid the maths say that it is almost similar to not intercept option (2.583 vs 2.445):
1 StB & 1 Fg A1 doing SBR against 2 intercepting Fgs D1 damage: 1D6+2
Sum: +7.775 - 5.33 = + 2.445 IPCs damage/SBR run

So, on a 1:1 basis, the actual system is broken since their is no real advantage for the defender to risk his precious fighters against such attack.

Here is the first system which I believe can create a better incentive to SBR or intercept without too much turmoil:

Strategic Bomber in air-to-air combat SBR:
Attack 0
Bombard IC or AB or NB damage: D6+3

Fighter in air-to-air combat SBR:
Attack 1
Defend 1

Tactical Bomber in air-to-air combat SBR:
Attack 1
Bombard AB or NB damage: 1D6

IC’s AA gun: @1 against each Strategic Bomber
Naval Base or Air Base’s AA gun: @1 against each Strategic Bomber or Tactical bomber

@Baron:

How can I be convincing? It is needed to compare a few situations between OOB and this new set of values.

First situation, risking a bomber? For the attacker, it is clearly better, the reward is basicaly near 1 IPC higher over OOB (+ 0.8 IPC):
3.417 IPCs/SBR against 2.583 IPCs/SBR.

1 Strategic Bomber doing SBR against no interceptor
Sum: + 5.417 - 2 = +3.417 IPCs damage/SBR
OOB G40: +4.583 - 2 = +2.583 IPCs damage/SBR

Does it worth it to intercept? Of, course there is no risk against any number of bombers. Their attack factor is @0.
On a 1:1 ratio, the attacker can still have better odds (but less than OOB) and there is a chance he can loose the bomber. So intercepting is always better.

1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Sum: + 4.514 - 3.667 = + 0.847 IPC. damage/SBR
OOB G40: + 5.486 - 3.667 = + 1.819 IPC damage/SBR

But, usually the attacker have more tactical options and can choose what will be the ratio he will commit into the SBR. And he can wait a 2:1 ratio by bringing in an escorting Fighter:
1 Fighter A1 and 1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Fg A1 D1 regular: + 7.084 - 3.667 = + 3.417 IPC damage/SBR
OOB G40: + 7.639 - 3.667 = + 3.972 IPCs damage/SBR
This show odds just a bit lower than OOB (a slightly better situation for defender) while the attacking escort provides the casualty buffer needed to make this case at similar odds as a no intercept situation. So, it is up to the defender to choose, both situations are similar: does he believe in his luck or not?

When it is a 1:1 ratio with 1 escort against 2 intercepting Fgs, this new SBR values are much more tempting for an interception (1.6 IPCs vs 2.442 IPCs) and letting the bomber directly attack IC it would rise to 3.417 IPCs/SBR , but still 1 attacking Fighter acting as a casualty fodder is pretty acceptable:
1 Fighter A1 and 1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Fg A1 D1 regular: + 6.933 - 5.333 = + 1.600 IPCs damage/SBR
OOB G40: +7.775 - 5.333 = + 2.442 IPCs damage/SBR

Also, this show that escorting 1 bomber (1.6 IPCs/SBR) gives as much reward than attacking only with bombers (1.693 IPCs/SBR):
2 Strategic Bombers A0 doing SBR against 2 interceptors D1
Sum: + 9.027 - 7.334 = + 1.693 IPCs damage/SBR
OOB G40: +10.973 - 7.334 = + 3.639 IPCs damage/SBR

Only the 2:1 ratio is better with bombers only:
2 Strategic Bombers A0 doing SBR against 1 interceptor D1
Sum: + 9.930 - 5.666 = + 4.264 IPCs damage/SBR
OOB G40: +11.459 - 5.666 = + 5.793 IPCs damage/SBR

but now the defender will not fear to loose his single intercepting Fighter and will commit it to reduce the attackers odds:

2 Strategic Bombers doing SBR against no interceptor
Sum: + 10.834 - 4 = +6.834 IPCs damage/SBR
OOB G40: +9.167 - 4 = +5.167 IPCs damage/SBR

Now, are you convinced that this little twist (bomber A0, +3 damage) will give more dog-fighting situations?

---

One last word about the chart down below.
It can be used to get pretty good average calculation for more complex situations:
3 bombers and 1 Fgs vs 3 Fgs. This can be obtained with 1 bomber+1 Fg against 2 Fgs and 2 bombers against 1 Fgs:

1 Fighter A1 and 1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Fg A1 D1 regular: + 6.933 - 5.333 = + 1.600 IPCs damage/SBR
+
2 Strategic Bombers A0 doing SBR against 1 interceptor D1
Sum: + 9.930 - 5.666 = + 4.264 IPCs damage/SBR

• 16.863 - 10.999 = + 5.864 IPCs/SBR

Which means: be prepare to loose either a bomber or a Fighter (-11 IPCs) and too inflict around 17 IPCs of damage, probably due to bombing.

Hope this can be found useful somehow.

@Baron:

Summary: StB A0 Damage: 1D6**+3**, Fg A1_fs_D1
1 Strategic Bomber doing SBR against no interceptor
Sum: + 5.417 - 2 = +3.417 IPCs damage/SBR
OOB G40: +4.583 - 2 = +2.583 IPCs damage/SBR

1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Sum: + 4.514 - 3.667 = + 0.847 IPC. damage/SBR
OOB G40: + 5.486 - 3.667 = + 1.819 IPC damage/SBR

1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Sum: + 3.762 - 5.056 = - 1.294 IPC. damage/SBR
OOB G40: + 4.85 - 5.056 = - 0.206 IPCs damage/SBR

1 Fighter A1 First Strike and 1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Sum: + 6.958 - 5.055 = + 1.903 IPC damage/SBR run
Fg A1_fs_D1 Bomber first: + 5.554 - 5.055 = + 0.499 IPC damage/SBR
StB A1 D6+3, Fg A1 D1 Bomber first: +7.094 - 5.333 = + 1.761 IPCs damage/StB
Fg A1 D1 regular: + 6.933 - 5.333 = + 1.600 IPC damage/SBR
OOB G40: +7.775 - 5.333 = + 2.442 IPCs damage/SBR

2 Strategic Bombers A0 doing SBR against 2 interceptors D1
Sum: + 9.027 - 7.334 = + 1.693 IPCs damage/SBR
OOB G40: +10.973 - 7.334 = + 3.639 IPCs damage/SBR

1 Fighter A1 First Strike and 1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Sum: + 7.084 - 3.388 = + 3.696 IPC damage/SBR
Fg A1_fs_D1 Bomber first: + 6.331 - 3.389 = + 2.942 IPC damage/SBR
StB A1 D6+3, Fg A1 D1 Bomber first: +7.570 - 3.667 = + 3.903 IPCs damage/StB
Fg A1 D1 regular: + 7.084 - 3.667 = + 3.417 IPC damage/SBR
OOB G40: + 7.639 - 3.667 = + 3.972 IPCs damage/SBR

2 Strategic Bombers A0 doing SBR against 1 interceptor D1
Sum: + 9.930 - 5.666 = + 4.264 IPCs damage/SBR
OOB G40: +11.459 - 5.666 = + 5.793 IPCs damage/SBR

2 Strategic Bombers doing SBR against no interceptor
Sum: + 10.834 - 4 = +6.834 IPCs damage/SBR
OOB G40: +9.167 - 4 = +5.167 IPCs damage/SBR

There is another more challenging way to do SBR, for instance by always letting interceptor hit takes a bomber casualty before any escorting Fgs, but I will explain it on the next post.

A more historical depiction of SBR which keeps interesting odds compared to G40 OOB.
In this one, intercepting Fighters are targeting attacking Bombers (TcBs or StBs) first, then escorting Fighters.

There is also a combined arms bonus for Strategic bomber in air-to-air combat which is consistent with an older HR invented when talking about Bombers spamming strategies (Darken skies), see down below:

Strategic Bomber
Attack 3-4, gets A4 if paired 1:1 with Fighter
Defense 1
Move 6
Cost 12
Damage 1D6+3.

Tactical Bomber
Attack 4
Defense 3
Move 4
Cost 11
Damage 1D6.

Strategic Bomber in air-to-air combat SBR:
Attack 0 or 1 when paired 1:1 with Fighter
Bombard IC or AB or NB damage: D6+3

Fighter in air-to-air combat SBR:
Attack 1
Gives +1A to 1 Strategic Bomber when paired 1:1 with.
Defend 1
Always hit Bombers first, whether Tactical or Strategic (owner’s choice).

Tactical Bomber in air-to-air combat SBR:
Attack 1
Bombard AB or NB damage: 1D6

IC’s AA gun: @1 against each Strategic Bomber
Naval Base or Air Base’s AA gun: @1 against each Strategic Bomber or Tactical bomber

@Baron:

Summary: StB A0 Damage: 1D6**+3**, Fg A1_fs_D1
1 Strategic Bomber doing SBR against no interceptor
Sum: + 5.417 - 2 = +3.417 IPCs damage/SBR
OOB G40: +4.583 - 2 = +2.583 IPCs damage/SBR

1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Sum: + 4.514 - 3.667 = + 0.847 IPC. damage/SBR
OOB G40: + 5.486 - 3.667 = + 1.819 IPC damage/SBR

1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Sum: + 3.762 - 5.056 = - 1.294 IPC. damage/SBR
OOB G40: + 4.85 - 5.056 = - 0.206 IPCs damage/SBR

1 Fighter A1 First Strike and 1 Strategic Bomber A0 doing SBR against 2 interceptors D1
Sum: + 6.958 - 5.055 = + 1.903 IPC damage/SBR run
Fg A1_fs_D1 Bomber first: + 5.554 - 5.055 = + 0.499 IPC damage/SBR
StB A1 D6+3, Fg A1 D1 Bomber first: +7.094 - 5.333 = + 1.761 IPCs damage/StB
Fg A1 D1 regular: + 6.933 - 5.333 = + 1.600 IPC damage/SBR
OOB G40: +7.775 - 5.333 = + 2.442 IPCs damage/SBR

2 Strategic Bombers A0 doing SBR against 2 interceptors D1
Sum: + 9.027 - 7.334 = + 1.693 IPCs damage/SBR
OOB G40: +10.973 - 7.334 = + 3.639 IPCs damage/SBR

1 Fighter A1 First Strike and 1 Strategic Bomber A0 doing SBR against 1 interceptor D1
Sum: + 7.084 - 3.388 = + 3.696 IPC damage/SBR
Fg A1_fs_D1 Bomber first: + 6.331 - 3.389 = + 2.942 IPC damage/SBR
StB A1 D6+3, Fg A1 D1 Bomber first: +7.570 - 3.667 = + 3.903 IPCs damage/StB
Fg A1 D1 regular: + 7.084 - 3.667 = + 3.417 IPC damage/SBR
OOB G40: + 7.639 - 3.667 = + 3.972 IPCs damage/SBR

2 Strategic Bombers A0 doing SBR against 1 interceptor D1
Sum: + 9.930 - 5.666 = + 4.264 IPCs damage/SBR
OOB G40: +11.459 - 5.666 = + 5.793 IPCs damage/SBR

2 Strategic Bombers doing SBR against no interceptor
Sum: + 10.834 - 4 = +6.834 IPCs damage/SBR
OOB G40: +9.167 - 4 = +5.167 IPCs damage/SBR

@Baron:

@barney:

I like the idea of bomber A3  +1 when paired with a fighter Baron. It’s the same way TACs are used. Also like the idea of fighter intercepts and escorts A2.
The increased range would be bombers greatest asset as well as being able to hit factories.

Nothing too radical and should be easy to adjust to.

I also like the  +1 when no enemy planes are present as well.

I think deeper about this Strategic and Tactical Bomber issue.
I believe the right historically inspired rules for them should have been the following, but the StB was too iconic to make such a change:

TACTICAL BOMBER
ATTACK 4
DEFENSE 3
MOVE 4
COST 11
Paired 1:1 with Tank, gives +1D to Tank (an historical point which I kept on defense to counter-balance the Attack @4 in all situations.)
TBR Attack 1 Damage 1D6

STRATEGIC BOMBER
Attack 3 rise to 4
when no enemy’s plane (+1 Attack due to Air Supremacy bonus) or
when paired 1:1 with Fighter
Defense 1
Move 6
Cost 12
SBR Attack 1 Damage 1D6+2

That way, when StBs are attacking a SZ without any Fighter support, then their attack value will be 3 while the defending Fg will keep their high Defense @4.

It will be only when they are paired with 1 Fighter escort per StB, that they can rise to an even combat Attack 4 against Defense @4.

---

I said more historical combat value because between TcBs and StBs, it seems to me that StBs were much more sitting duck than TcBs. So, it should have been StB which clearly needs a combined arms for Fighter support. Many TacBs types of Fg-bomber or Light-Bomber were able to fly without escort.

Here is what I would prefer as Fg unit to fix the other balance issue in SBR:
FIGHTER
Attack 3
Defense 4
Move 4
Cost 10
Gives +1A to StB when paired 1:1
SBR Attack 2 Defense 2

Working on the most balanced SBR with Fighter A2 D2, a complete table is needed to make any useful comparison:
Comparison of various SBR OOB & HRules StB A1 damage 1D6+2 /1D6+3 / 2D6 / Fg escort A2 Interceptor D2
SBR HRules : 1 StB doing SBR without interceptor, various damage:
D6+2 (avg 5.5 IPCs): : +4.583 - 2 = +2.583 IPCs damage/SBR
D6+3 (avg 6.5 IPCs): +5.417 - 2 = +3.417 IPCs damage/SBR
2D6 (avg 7 IPCs): : +5.833 - 2 = +3.833 IPCs damage/SBR

G40 OOB D6+2: +4.583 - 2 = +2.583 IPCs damage/SBR
Triple A 1942.2 D6 (avg 3.5 IPCs): +2.917 - 2 = +0.917 IPC damage/SBR
OOB 1942.2 D6: +2.917 - 2 = +0.917 IPC damage/SBR
1942.2 D6+2: +4.583 - 2 = +2.583 IPCs damage/SBR

SBR HRules :1 StB A1 vs 1 Fg D2
D6+2: +4.723 - 5.333 = -0.61 IPC. damage/SBR
D6+2 (First target: StB A1fs =2AA@1): +4.977 - 4.778 = +0.199 IPC damage/SBR
D6+3: +5.278 -5.333 = -0.055 IPC damage/SBR
D6+3 (First target: StB A1fs =2AA@1): +5.579 - 4.778 = +0.801 IPC damage/SBR
2D6: + 5.556 - 5.333 = +0.223 IPC. damage/SBR
2D6 (First target: StB A1fs =2AA@1): +5.880 - 4.778 = +1.102 IPCs damage/SBR

G40 OOB D6+2: + 5.486 - 3.667 = +1.819 IPC damage/SBR
Triple A 1942.2 D6: +3.69 - 3.667 = +0.023 IPC damage/SBR
OOB 1942.2 D6: +3.8 - 4.8 = -1 IPC damage/SBR
1942.2 D6+2: +4.977 - 4.778 = +0.199 IPC damage/StB

SBR HR: 1 StB A1 doing SBR against 2 intercepting Fgs D2
D6+2: +3.704- 7.556 = -3.852 IPCs damage/SBR
D6+2 (StB=2AA@1): +5.093- 7.556 = -2.463 IPCs damage/SBR
D6+2 (First target: StB A1fs =2AA@1): +5.659 - 6.321 = -0.662 IPCs damage/SBR

D6+3: +4.074- 7.556 = -3.482 IPCs damage/SBR
D6+3 (StB=2AA@1): +5.463 -7.556= -2.093 IPCs damage/SBR
D6+3 (First target: StB A1fs =2AA@1): +6.132 -6.321 = -0.189 IPCs damage/SBR

2D6: +4.260- 7.556 = -3.296 IPCs damage/SBR
2D6 (StB=2AA@1): +5.649- 7.556 = -1.907 IPCs damage/SBR
2D6 (First target: StB A1fs =2AA@1): +6.369 - 6.321 = +0.048 IPCs damage/SBR

G40 OOB D6+2: +4.85 - 5.056 = -0.206 IPCs damage/SBR
Triple A 1942.2 D6: +2.025 - 5.056 = -3.031 IPCs damage/SBR
OOB 1942.2 D6:+3.071 - 7.185 = -4.114 IPC. damage/SBR
1942.2 D6+2: +3.874 - 7.185 = -3.311 IPCs damage/SBR

SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 2 intercepting Fgs D2
D6+2: +9.074 - 8.667 = +0.407 IPC damage/SBR
D6+2 (StB=2AA@1): +10.648 - 8.667 = +1.981 IPC damage/SBR
D6+2 (First target: StB=2AA@1): +8.611 - 8.667 = -0.056 IPC damage/SBR
D6+2 (First target: StB A1fs =2AA@1): +8.965 - 7.556 = +1.409 IPC damage/SBR

D6+3: +9.815 - 8.667 = +1.148 IPC damage/SBR
D6+3 (StB=2AA@1): +11.389 - 8.667= +2.722 IPCs damage/SBR
D6+3 (First target: StB=2AA@1): +8.981 - 8.667 = +0.314 IPCs damage/SBR
D6+3 (First target: StB A1fs =2AA@1): +9.399 - 7.556 = +1.843 IPCs damage/SBR

2D6: +10.185 - 8.667 = +1.518 IPC damage/SBR
2D6 (StB=2AA@1): +11.759 - 8.667 = +3.092 IPCs damage/SBR
2D6 (First target: StB=2AA@1): +9.167- 8.667 = +0.500 IPCs damage/SBR
2D6 (First target: StB A1fs =2AA@1): +9.617- 7.556 = +2.061 IPCs damage/SBR

OOB G40 D6+2: +7.775 - 5.33 = +2.445 IPCs damage/SBR
Triple A 1942.2 D6: +6.155 - 5.33 = +0.825 IPC damage/SBR
OOB 1942.2 D6: +6.018 - 7.555 = -1.537 IPCs damage/SBR
1942.2 D6+2: +7.554 - 7.564 = -0.01 IPC damage/SBR

SBR HR: 2 StBs A1 doing SBR against 2 intercepting Fgs D2
D6+2: +9.445 - 10.667 = -1.222 IPCs damage/SBR
D6+2 (First target: StB A1fs =2AA@1): +9.954 - 9.556 = +0.398 IPC damage/StB
D6+3: +10.556 - 10.667 = -0.111 IPCs damage/SBR
D6+3 (First target: StB A1fs =2AA@1): +11.158 - 9.556 = +1.602 IPCs damage/SBR
2D6: +11.112 - 10.667 = +0.445 IPCs damage/SBR
2D6 (First target: StB A1fs =2AA@1): +11.760 - 9.556 = +2.204 IPCs damage/SBR

G40 OOB D6+2: +10.973 - 7.334 = +3.639 IPCs damage/SBR
Triple A 1942.2 D6: +8.195 - 7.334 = +0.861 IPC damage/SBR
OOB 1942.2 D6: +7.547 - 9.556 = -2.009 IPCs damage/SBR
1942.2 D6+2: +9.954 - 9.556 = +0.398 IPC damage/StB

SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 1 intercepting Fgs D2
D6+2: +9.027 - 5.333 = +3.694 IPCs damage/SBR
D6+2 (First target: StB=2AA@1): +7.500 -5.333 = +2.167 IPCs damage/SBR
D6+2 (First target: StB A1fs =2AA@1): +7.754 -4.777 = +2.977 IPCs damage/SBR

D6+3: +9.861 - 5.333 = +4.528 IPCs damage/SBR
D6+3 (First target: StB=2AA@1): +6.5= +8.055 -5.333 = +2.722 IPCs damage/SBR
D6+3 (First target: StB A1fs =2AA@1): +8.356 -4.777 = +3.579 IPCs damage/SBR

2D6: + 10.277 - 5.333 = +4.944 IPCs damage/SBR
2D6 (First target: StB=2AA@1): +8.333 -5.333 = +3 IPCs damage/SBR
2D6 (First target: StB A1fs =2AA@1): +8.657 -4.777 = +3.880 IPCs damage/SBR

G40 OOB D6+2: +7.639 - 3.667 = +3.972 IPCs damage/SBR
Triple A 1942.2 D6: +5.973 - 3.667 = +2.306 IPCs damage/SBR
OOB 1942.2 D6: +5.973 - 5.159 = +0.814 IPCs damage/SBR
1942.2 D6+2: +7.639 -5.159 = +2.480 IPCs damage/SBR

SBR HR: 2 StBs A1 doing SBR against 1 intercepting Fgs D2
D6+2: +10.639 - 7.334 = +3.304 IPCs damage/SBR
D6+2 (StB=2AA@1): +9.306 - 7.334 = +1.972 IPCs damage/SBR
D6+2 (First target: StB A1fs =2AA@1): +9.561 - 6.778 = +2.783 IPCs damage/SBR

D6+3: +12.027 - 7.334 = +4.693 IPCs damage/SBR
D6+3 (StB=2AA@1):+10.695 - 7.334 = +3.361 IPCs damage/SBR
D6+3 (First target: StB A1fs =2AA@1): +10.996 - 6.778 = +4.218 IPCs damage/SBR

2D6: +12.722 - 7.334 = +5.388 IPCs damage/SBR
2D6 (StB=2AA@1): +11.389 - 7.334 = +4.055 IPCs damage/SBR
2D6 (First target: StB A1fs =2AA@1): +11.714 - 6.778 = +4.936 IPCs damage/SBR

G40 OOB D6+2: +11.459 - 5.666 = +5.793 IPCs damage/SBR
Triple A 1942.2 D6: +8.403 - 5.666 = +2.737 IPCs damage/StB
OOB 1942.2 D6: +8.214 - 6.315 = +1.899 IPCs damage/SBR
1942.2 D6+2: +11.162 - 6.315 = +4.847 IPCs damage/SBR

SBR HRules : 2 StBs doing SBR without interceptor
D6+2 (avg 5.5 IPCs): +9.166 - 4 = +5.166 IPCs damage/SBR
D6+3 (avg 6.5 IPCs): +10.834 - 4 = +6.834 IPCs damage/SBR
2D6 (avg 7 IPCs): +11.666 - 4 = +7.666 IPCs damage/SBR

OOB G40 D6+2: +9.166 - 4 = +5.166 IPCs damage/SBR
Triple A 1942.2 D6: +5.834 - 4 = +1.834 IPCs damage/SBR
OOB 1942.2 D6: +5.834 - 4 = +1.834 IPCs damage/SBR
1942.2 D6+2: +9.166 - 4 = +5.166 IPCs damage/SBR

Working on the most balanced SBR with Fighter A2 D2, and the winner is…

A more historical depiction of SBR which keeps interesting odds compared to G40 OOB.
In this one, intercepting Fighters are targeting attacking Bombers (TcBs or StBs) first, then escorting Fighters.

There is also a special attack (as an AA gun @1 first strike against up to 2 Fighters) for each Strategic bomber (whichever the lesser number between Fgs or StBs) in air-to-air combat which provides some restriction about Bombers spamming strategies (Darken skies), see above chart for comparisons:

Strategic Bomber
Attack 4
Defense 1
Move 6
Cost 12
SBR or TBR damage 1D6+2.

Tactical Bomber
Attack 3-4
Defense 3
Move 4
Cost 11
TBR damage 1D6.

Fighter in air-to-air combat SBR:
Attack 2
Defend 2
Always hit Bombers as first target, whether Tactical or Strategic (owner’s choice).

Strategic Bomber in air-to-air combat SBR:
Attack 1 first strike* as an AA gun @1 against up to 2 intercepting Fighters, whichever the lesser
Bombard Industrial Complex or Air Base or Naval Base, damage: 1D6+2

Tactical Bomber in air-to-air combat SBR:
Attack 1 first strike
Bombard Air Base or Naval Base, damage: 1D6

IC’s AA gun: @1 against each Strategic Bomber
Naval Base or Air Base’s AA gun: @1 against each Strategic Bomber or Tactical bomber

I will explain sooner how I came to this conclusion.

Follow this line in each combat situation (fs= first strike):
D6+2 (First target: StB A1fs =2AA@1)

@Baron:

Working on the most balanced SBR with Fighter A2 D2, a complete table is needed to make any useful comparison:
Comparison of various SBR OOB & HRules StB A1 damage 1D6+2 / Fg escort A2 Interceptor D2

SBR HRules : 1 StB doing SBR without interceptor, various damage:
D6+2 (avg 5.5 IPCs): : +4.583 - 2 = +2.583 IPCs damage/SBR
G40 OOB D6+2: +4.583 - 2 = +2.583 IPCs damage/SBR
1942.2 D6+2: +4.583 - 2 = +2.583 IPCs damage/SBR

SBR HRules :1 StB A1 vs 1 Fg D2
D6+2 (First target: StB A1fs =2AA@1): +4.977 - 4.778 = +0.199 IPC damage/SBR
G40 OOB D6+2: + 5.486 - 3.667 = +1.819 IPC damage/SBR
1942.2 D6+2: +4.977 - 4.778 = +0.199 IPC damage/StB

SBR HR: 1 StB A1 doing SBR against 2 intercepting Fgs D2
D6+2 (First target: StB A1fs =2AA@1): +5.659 - 6.321 = -0.662 IPCs damage/SBR
G40 OOB D6+2: +4.85 - 5.056 = -0.206 IPCs damage/SBR
1942.2 D6+2: +3.874 - 7.185 = -3.311 IPCs damage/SBR

SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 2 intercepting Fgs D2
D6+2 (First target: StB A1fs =2AA@1): +8.965 - 7.556 = +1.409 IPC damage/SBR
OOB G40 D6+2: +7.775 - 5.33 = +2.445 IPCs damage/SBR
1942.2 D6+2: +7.554 - 7.564 = -0.01 IPC damage/SBR

SBR HR: 2 StBs A1 doing SBR against 2 intercepting Fgs D2
D6+2 (First target: StB A1fs =2AA@1): +9.954 - 9.556 = +0.398 IPC damage/StB
G40 OOB D6+2: +10.973 - 7.334 = +3.639 IPCs damage/SBR
1942.2 D6+2: +9.954 - 9.556 = +0.398 IPC damage/StB

SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 1 intercepting Fgs D2
D6+2 (First target: StB A1fs =2AA@1): +7.754 -4.777 = +2.977 IPCs damage/SBR
G40 OOB D6+2: +7.639 - 3.667 = +3.972 IPCs damage/SBR
1942.2 D6+2: +7.639 -5.159 = +2.480 IPCs damage/SBR

SBR HR: 2 StBs A1 doing SBR against 1 intercepting Fgs D2
D6+2 (First target: StB A1fs =2AA@1): +9.561 - 6.778 = +2.783 IPCs damage/SBR
G40 OOB D6+2: +11.459 - 5.666 = +5.793 IPCs damage/SBR
1942.2 D6+2: +11.162 - 6.315 = +4.847 IPCs damage/SBR

SBR HRules : 2 StBs doing SBR without interceptor
D6+2 (avg 5.5 IPCs): +9.166 - 4 = +5.166 IPCs damage/SBR
OOB G40 D6+2: +9.166 - 4 = +5.166 IPCs damage/SBR
1942.2 D6+2: +9.166 - 4 = +5.166 IPCs damage/SBR

@oztea:

Totally different suggestion I have been considering.
Bombers ALWAYS do their +2 damage, even if hit by AAA.
To make SBR more attractive.

You could consider this rule to offset your beefing up of fighters.

From a realistic standpoint it has always been gut-wrenching to send over 2 bombers and get snake-eyed. Knowing that you just sent over probably 1000 bombers and not a single bomb fell on anything important.

The main issue was about making an incentive for dogfight.
OOB G40 bombers are abusive against intercepting fighters.

If you feel the most repelling is the IC’s AA gun, this probably can be work out in the way you suggested, but clearly the attack factor of bomber will be probably zero to not be OP.
I will try to check out how this “D6+2 damage OR only +2 damage” can be calculated and what is a balance mechanics between StBs, escorts and interceptors.

The snake eyes are probably another non-neglectable deterrent aspect which can be most frustrating for attacking player.
A minimum damage sounds like a consolation prize, at least, it let’s the steam out a bit. :-)
Thanks.

@oztea:

Totally different suggestion I have been considering.
Bombers ALWAYS do their +2 damage, even if hit by AAA.
To make SBR more attractive.

You could consider this rule to offset your beefing up of fighters.

From a realistic standpoint it has always been gut-wrenching to send over 2 bombers and get snake-eyed. Knowing that you just sent over probably 1000 bombers and not a single bomb fell on anything important.

Bombers ALWAYS do their +2 damage, even if hit by AAA.
Do you also imply when destroyed by interceptors, Bombers can still do +2 damage?

After a fast review, I think I would add your idea as integrated part of the above SBR HR, since it has a small statistical impact (approx. 3,00 IPCs/SBR instead of 2,583 IPCs/SBR.)

I would keep the +2 damage only if hit by AAA exclusively, when an interceptor hit bombers, it is destroyed with no compensation.
That way, it would provide an additional incentive to intercept bombers to wholy protect IC.
And this is a double lever effect.
Attacker will more willingly commit bombers and defender will be more incline to throw fighters against them.
And this is in addition to the fact, that interceptor’s hit must be on bombers first.
It is a much more interesting target.

Working on the most balanced SBR with Fighter A2 D2, a more complete table is needed to make for additional options:
Comparison of various SBR OOB & HRules StB A1 damage 1D6+2 /1D6+3 / 2D6 / Fg escort A2 Interceptor D2
http://www.axisandallies.org/forums/index.php?topic=35883.msg1409543#msg1409543
http://www.axisandallies.org/forums/index.php?topic=35614.msg1392008#msg1392008

Here is the minimum damage for each StB killed by AAA according to SBR basic damage:
D6: +1 IPC
D6+1: +1 IPC
D6+2: +2 IPCs
D6+3: +3 IPCs
2D6:+3 IPCs

SBR HRules : 1 StB doing SBR without interceptor, various damage:
Regular SBRs                                                               /  with special HR bonus damage to IC when STB is killed by IC’s AAA
1D6 (avg 3.5 IPCs): +2.917 - 2 = +0.917 IPCs damage/SBR     / +1.084 IPCs damage/SBR
1D6+1 (avg 4.5 IPCs): +3.750 - 2 = +1.750 IPCs damage/SBR   / +1.917 IPCs damage/SBR
1D6+2 (avg 5.5 IPCs): +4.583 - 2 = +2.583 IPCs damage/SBR  / +2.916 IPCs damage/SBR
1D6+3 (avg 6.5 IPCs): +5.417 - 2 = +3.417 IPCs damage/SBR  / +3.917 IPCs damage/SBR
2D6 (avg 7 IPCs): +5.833 - 2 = +3.833 IPCs damage/SBR      / +4.333 IPCs damage/SBR

G40 OOB D6+2: +4.583 - 2 = +2.583 IPCs damage/SBR
Triple A 1942.2 D6: +2.917 - 2 = +0.917 IPC damage/SBR
OOB 1942.2 D6: +2.917 - 2 = +0.917 IPC damage/SBR
1942.2 D6+2: +4.583 - 2 = +2.583 IPCs damage/SBR

SBR HRules :1 StB A1 doing SBR against 1 intercepting Fg D2
Regular SBRs                                                               /  with special HR bonus damage to IC when STB is killed by IC’s AAA
1D6: +3.611 - 5.333 = -1.722 IPCs damage/SBR      / -1.611 IPCs damage/SBR
1D6+1: +3.75 - 5.333 = -1.583 IPCs damage/SBR   / -1.472 IPCs damage/SBR
1D6+2: +4.723 - 5.333 = -0.61 IPC damage/SBR  / -0.388 IPCs damage/SBR
1D6+3: +5.278 - 5.333 = -0.055 IPCs damage/SBR  / +0.278 IPCs damage/SBR
2D6: +5.556 - 5.333 = +0.223 IPC damage/SBR  / +0.556 IPCs damage/SBR

Regular SBRs    (First target: StB A1_first strike_ =2AA@1)  /  with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +4.712 - 6.321 = -1.609 IPCs damage/SBR      / -1.514 IPCs damage/SBR
1D6+1: +4.375 - 4.778 = -0.403 IPC damage/SBR    / -0.283 IPCs damage/SBR
1D6+2: +4.977 - 4.778 = +0.199 IPCs damage/SBR  / +0.440 IPC damage/SBR
1D6+3: +5.579 - 4.778 = +0.801 IPCs damage/SBR  / +1.162 IPCs damage/SBR
2D6: +5.880 - 4.778 = +1.102 IPCs damage/SBR  / +1.463 IPCs damage/SBR

G40 OOB D6+2: + 5.486 - 3.667 = +1.819 IPC damage/SBR
Triple A 1942.2 D6: +3.69 - 3.667 = +0.023 IPC damage/SBR
OOB 1942.2 D6: +3.8 - 4.8 = -1 IPC damage/SBR
1942.2 D6+2: +4.977 - 4.778 = +0.199 IPC damage/StB

SBR HR: 1 StB A1 doing SBR against 2 intercepting Fgs D2
Regular SBRs                                                               /  with special HR bonus damage to IC when StB is killed by IC’s AAA
1D6: +2.963 - 7.556 = -4.593 IPCs damage/SBR      / -4.519 IPCs damage/SBR
1D6+1: +3.334 - 7.556 = -4.222 IPCs damage/SBR    / -4.148 IPCs damage/SBR
1D6+2: +3.704 - 7.556 = -3.852 IPCs damage/SBR  / -3.704 IPCs damage/SBR
1D6+3: +4.074 - 7.556 = -3.482 IPCs damage/SBR  / -3.260 IPCs damage/SBR
2D6: +4.260 - 7.556 = -3.296 IPCs damage/SBR / -3.074 IPCs damage/SBR

D6+2 (StB=2AA@1): +5.093- 7.556 = -2.463 IPCs damage/SBR
D6+3 (StB=2AA@1): +5.463 -7.556= -2.093 IPCs damage/SBR
2D6 (StB=2AA@1): +5.649- 7.556 = -1.907 IPCs damage/SBR

First target: StB A1fs =2AA@1: as AA against up to 2 Fgs / with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +4.712 - 6.321 = -1.609 IPCs damage/SBR      / -1.514 IPCs damage/SBR
1D6+1: +5.186 - 6.321 = -1.135 IPC damage/SBR    / -1.040 IPCs damage/SBR
1D6+2: +5.659 - 6.321 = -0.662 IPCs damage/SBR  / -0.473 IPC damage/SBR
1D6+3: +6.132 -6.321 = -0.189 IPCs damage/SBR  / +0.095 IPCs damage/SBR
2D6: +6.369 - 6.321 = +0.048 IPCs damage/SBR  / +0.764 IPCs damage/SBR

G40 OOB D6+2: +4.85 - 5.056 = -0.206 IPCs damage/SBR
Triple A 1942.2 D6: +2.025 - 5.056 = -3.031 IPCs damage/SBR
OOB 1942.2 D6:+3.071 - 7.185 = -4.114 IPC. damage/SBR
1942.2 D6+2: +3.874 - 7.185 = -3.311 IPCs damage/SBR

SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 2 intercepting Fgs D2
Regular SBRs                                                               /  with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +7.593 - 8.667 = -1.074 IPCs damage/SBR      / -0.926 IPC damage/SBR
1D6+1: +8.333 - 8.667 = -0.334 IPC  damage/SBR   / -0.186 IPCs damage/SBR
1D6+2: +9.074 - 8.667 = +0.407 IPC damage/SBR  / +0.703 IPC damage/SBR
1D6+3: +9.815 - 8.667 = +1.148 IPCs damage/SBR / +1.592 IPCs damage/SBR
2D6: +10.185 - 8.667 = +1.518 IPCs damage/SBR  / +1.962 IPCs damage/SBR

D6+2 (StB=2AA@1): +10.648 - 8.667 = +1.981 IPC damage/SBR
D6+3 (StB=2AA@1): +11.389 - 8.667= +2.722 IPCs damage/SBR
2D6 (StB=2AA@1): +11.759 - 8.667 = +3.092 IPCs damage/SBR

(First target: StB=2AA@1): StB A1 as AAA against up to 2 Fgs    /  with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +7.870 - 8.667 = -0.797 IPCs damage/SBR      / -0.723 IPCs damage/SBR
1D6+1: +8.241 - 8.667 = -0.426 IPC  damage/SBR   / -0.352 IPCs damage/SBR
D6+2: +8.611 - 8.667 = -0.056 IPC damage/SBR  / +0.092 IPC damage/SBR
1D6+3:+8.981 - 8.667 = +0.314 IPCs damage/SBR  / +0.536 IPCs damage/SBR
2D6: +9.167- 8.667 = +0.500 IPCs damage/SBR  / +0.722 IPCs damage/SBR

(First target: StB A1_first strike_ as AAA vs up to 2 Fgs)     /  with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +8.095 - 7.556 = +0.539 IPC damage/SBR      / +0.626 IPC damage/SBR
1D6+1: +8.530 - 7.556 = +0.974 IPC damage/SBR    / +1.061 IPCs damage/SBR
D6+2: 8.965 - 7.556 = +1.409 IPC damage/SBR  / +1.583 IPCs damage/SBR
1D6+3:+9.399 - 7.556 = +1.843 IPCs  damage/SBR  / +2.104 IPCs damage/SBR
2D6: +9.617- 7.556 = +2.061 IPCs damage/SBR   / +2.322 IPCs damage/SBR

OOB G40 D6+2: +7.775 - 5.33 = +2.445 IPCs damage/SBR
Triple A 1942.2 D6: +6.155 - 5.33 = +0.825 IPC damage/SBR
OOB 1942.2 D6: +6.018 - 7.556 = -1.538 IPCs damage/SBR
1942.2 D6+2: +7.557 - 7.556 = +0.001 IPCs damage/StB

G40 SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 3 intercepting Fgs D2
1D6+2: +8.395 - 11.630 = -3.235 IPC damage/SBR / -2.988 IPC damage/SBR

Regular SBRs  with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +7.160 - 11.630 = -4.470 IPCs damage/SBR / -4.347 IPC damage/SBR
1D6+1: +7.778 - 11.630 = -3.852 IPC damage/SBR / -3.729 IPCs damage/SBR
1D6+2: +8.395 - 11.630 = -3.235 IPC damage/SBR / -2.988 IPC damage/SBR
1D6+3: +9.012 - 11.630 = -2.618 IPCs damage/SBR / -2.248 IPCs damage/SBR
2D6: +9.321 - 11.630 = -2.309 IPCs damage/SBR / -1.939 IPCs damage/SBR

SBR HR: 2 StBs A1 doing SBR against 2 intercepting Fgs D2
Regular SBRs                                                               /  with special HR bonus damage to IC when 1 StB or 2 STB are killed by IC’s AAA
1D6: +7.222 - 10.667 = -3.445 IPCs damage/SBR      / -3.222 IPCs damage/SBR
1D6+1: +8.334 - 10.667 = -2.333 IPC damage/SBR    / -2.110 IPCs damage/SBR
1D6+2: +9.445 - 10.667 = -1.222 IPCs damage/SBR  / -0.336 IPC damage/SBR
1D6+3: +10.556 - 10.667 = -0.111 IPC damage/SBR  / +0.557 IPCs damage/SBR
2D6: +11.112 - 10.667 = +0.445 IPC damage/SBR  / +1.113 IPCs damage/SBR

First target: StB A1 first strike, as AAA up to 2 Fgs      /  with special HR bonus damage to IC when 1 or 2 StBs are killed by IC’s AAA
1D6: +7.547 - 9.556 = -2.009 IPCs damage/SBR       / -1.835 IPCs damage/SBR
1D6+1: +8.751 - 9.556 = -0.805 IPCs damage/SBR    / -0.631 IPCs damage/SBR
1D6+2: +9.954 - 9.556 = +0.398 IPCs damage/SBR   / +0.746 IPCs damage/SBR
1D6+3: +11.158 - 9.556 = +1.602 IPCs  damage/SBR / +2.124 IPCs damage/SBR
2D6: +11.760 - 9.556 = +2.204 IPCs damage/SBR   / +2.726 IPCs damage/SBR

G40 OOB D6+2: +10.973 - 7.334 = +3.639 IPCs damage/SBR
Triple A 1942.2 D6: +8.195 - 7.334 = +0.861 IPC damage/SBR
OOB 1942.2 D6: +7.547 - 9.556 = -2.009 IPCs damage/SBR
1942.2 D6+2: +9.954 - 9.556 = +0.398 IPC damage/StB

SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 1 intercepting Fgs D2
Regular SBRs                                                                /  with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +7.361 - 5.333 = +2.028 IPCs  damage/SBR     / +2.195 IPCs damage/SBR
1D6+1: +8.194 - 5.333 = +2.861 IPCs damage/SBR    / +3.028 IPCs damage/SBR
1D6+2: +9.027 - 5.333 = +3.694 IPCs damage/SBR  / +4.027 IPCs damage/SBR
1D6+3: +9.861 - 5.333 = +4.528 IPCs damage/SBR  / +5.028 IPCs damage/SBR
2D6: +10.277 - 5.333 = +4.944 IPCs damage/SBR  / +5.444 IPCs damage/SBR

D6+2 (First target: StB=2AA@1): +7.500 -5.333 = +2.167 IPCs damage/SBR
D6+3 (First target: StB=2AA@1): +6.5= +8.055 -5.333 = +2.722 IPCs damage/SBR
2D6 (First target: StB=2AA@1): +8.333 -5.333 = +3 IPCs damage/SBR

(First target: StB A1fs =2AA@1):    /  with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +6.550 - 4.777 = +1.773 IPCs  damage/SBR     / +1.893 IPCs damage/SBR
1D6+1: +7.152 - 4.777 = +2.375 IPCs  damage/SBR   / +2.495 IPCs damage/SBR
D6+2: +7.754 -4.777 =+2.977 IPCs damage/SBR  /  +3.218 IPC damage/SBR
1D6+3:+8.356 -4.777 = +3.579 IPCs  damage/SBR  / +3.940 IPCs damage/SBR
2D6: +8.657 -4.777 = +3.880 IPCs damage/SBR   / +4.241 IPCs damage/SBR

G40 OOB D6+2: +7.639 - 3.667 = +3.972 IPCs damage/SBR
Triple A 1942.2 D6: +5.973 - 3.667 = +2.306 IPCs damage/SBR
OOB 1942.2 D6: +5.973 - 5.159 = +0.814 IPCs damage/SBR
1942.2 D6+2: +7.639 -5.159 = +2.480 IPCs damage/SBR

SBR HR: 2 StBs A1 doing SBR against 1 intercepting Fgs D2
Regular SBRs                                                            /  with special HR bonus damage to IC when 1 or 2 StBs are killed by IC’s AAA
1D6: +7.861 - 7.334 = +0.527 IPCs damage/SBR      / +0.805 IPCs damage/SBR
1D6+1: +9.250 - 7.334 = +1.916 IPCs  damage/SBR   / +2.194 IPCs damage/SBR
1D6+2: +10.639 - 7.334 = +3.304 IPCs damage/SBR  / +3.860 IPCs damage/SBR
1D6+3: +12.028 - 7.334 = +4.694 IPCs damage/SBR  / +5.527 IPCs damage/SBR
2D6: +12.722 - 7.334 = +5.388 IPCs  damage/SBR / +6.221 IPCs damage/SBR

D6+2 (StB=2AA@1): +9.306 - 7.334 = +1.972 IPCs damage/SBR
D6+3 (StB=2AA@1):+10.695 - 7.334 = +3.361 IPCs damage/SBR
2D6 (StB=2AA@1): +11.389 - 7.334 = +4.055 IPCs damage/SBR

First target: StB A1 first strike, as AAA against up to 2 Fgs  /  with special HR bonus damage to IC when 1 or 2 StBs are killed by IC’s AAA
1D6: +6.690 - 6.778 = -0.088 IPCs damage/SBR       / +0.153 IPCs damage/SBR
1D6+1: +8.125 - 6.778 = +1.347 IPCs damage/SBR    / +1.588 IPCs damage/SBR
1D6+2: +9.561 - 6.778 = +2.783 IPCs damage/SBR   / +3.264 IPCs damage/SBR
1D6+3: +10.996 - 6.778 = +4.218 IPCs damage/SBR  / +4.940 IPCs damage/SBR
2D6: +11.714 - 6.778 = +4.936 IPCs damage/SBR   / +5.658 IPCs damage/SBR

G40 OOB D6+2: +11.459 - 5.666 = +5.793 IPCs damage/SBR
Triple A 1942.2 D6: +8.403 - 5.666 = +2.737 IPCs damage/StB
OOB 1942.2 D6: +8.214 - 6.315 = +1.899 IPCs damage/SBR
1942.2 D6+2: +11.162 - 6.315 = +4.847 IPCs damage/SBR

SBR HRules : 2 StBs doing SBR without interceptor
Regular SBRs                                                               /  with special HR bonus damage to IC when 1 or 2 STBs are killed by IC’s AAA
1D6 (avg 3.5 IPCs): +5.834 - 4 = +1.834 IPCs damage/SBR     / +2.168 IPCs damage/SBR
1D6+1 (avg 4.5 IPCs): +7.500 - 4 = +3.500 IPCs damage/SBR   / +3.834 IPCs damage/SBR
1D6+2 (avg 5.5 IPCs): +9.166 - 4 = +5.166 IPCs damage/SBR  / +5.832 IPCs damage/SBR
1D6+3 (avg 6.5 IPCs): +10.834 - 4 = +6.834 IPCs damage/SBR  / +7.834 IPCs damage/SBR
2D6 (avg 7 IPCs): +11.666 - 4 = +7.666 IPCs  damage/SBR     / +8.666 IPCs damage/SBR

OOB G40 D6+2: +9.166 - 4 = +5.166 IPCs damage/SBR
Triple A 1942.2 D6: +5.834 - 4 = +1.834 IPCs damage/SBR
OOB 1942.2 D6: +5.834 - 4 = +1.834 IPCs damage/SBR
1942.2 D6+2: +9.166 - 4 = +5.166 IPCs damage/SBR

@Baron:

Working on the most balanced SBR with Fighter A2 D2, and the winner is…

A more historical depiction of SBR which keeps interesting odds compared to G40 OOB.
In this one, intercepting Fighters are targeting attacking Bombers (TcBs or StBs) first, then escorting Fighters.

There is also a special attack (as an AA gun @1 first strike against up to 2 Fighters) for each Strategic bomber (whichever the lesser number between Fgs or StBs) in air-to-air combat which provides some restriction about Bombers spamming strategies (Darken skies), see above chart for comparisons:

Strategic Bomber
Attack 4
Defense 1
Move 6
Cost 12
SBR or TBR damage 1D6+2.

Tactical Bomber
Attack 3-4
Defense 3
Move 4
Cost 11
TBR damage 1D6.

---

Fighter in air-to-air combat SBR:
Attack 2
Defend 2
Always hit Bombers as first target, whether Tactical or Strategic (owner’s choice).

Strategic Bomber in air-to-air combat SBR:
Attack 1 first strike* as an AA gun @1 against up to 2 intercepting Fighters, whichever the lesser
Bombard Industrial Complex or Air Base or Naval Base, damage: 1D6+2

Tactical Bomber in air-to-air combat SBR:
Attack 1 first strike
Bombard Air Base or Naval Base, damage: 1D6

IC’s AA gun: @1 against each Strategic Bomber
Naval Base or Air Base’s AA gun: @1 against each Strategic Bomber or Tactical bomber

---

I will explain sooner how I came to this conclusion.

Follow this line in each combat situation (fs= first strike):
D6+2 (First target: StB A1fs =2AA@1)

@Baron:

Working on the most balanced SBR with Fighter A2 D2, a complete table is needed to make any useful comparison:
Comparison of various SBR OOB & HRules StB A1 damage 1D6+2 / Fg escort A2 Interceptor D2

SBR HRules : 1 StB doing SBR without interceptor, various damage:
D6+2 (avg 5.5 IPCs): : +4.583 - 2 = +2.583 IPCs damage/SBR
G40 OOB D6+2: +4.583 - 2 = +2.583 IPCs damage/SBR
1942.2 D6+2: +4.583 - 2 = +2.583 IPCs damage/SBR

SBR HRules :1 StB A1 vs 1 Fg D2
D6+2 (First target: StB A1fs =2AA@1): +4.977 - 4.778 = +0.199 IPC damage/SBR
G40 OOB D6+2: + 5.486 - 3.667 = +1.819 IPC damage/SBR
1942.2 D6+2: +4.977 - 4.778 = +0.199 IPC damage/StB

SBR HR: 1 StB A1 doing SBR against 2 intercepting Fgs D2
D6+2 (First target: StB A1fs =2AA@1): +5.659 - 6.321 = -0.662 IPCs damage/SBR
G40 OOB D6+2: +4.85 - 5.056 = -0.206 IPCs damage/SBR
1942.2 D6+2: +3.874 - 7.185 = -3.311 IPCs damage/SBR

SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 2 intercepting Fgs D2
D6+2 (First target: StB A1fs =2AA@1): +8.965 - 7.556 = +1.409 IPC damage/SBR
OOB G40 D6+2: +7.775 - 5.33 =+2.445 IPCs damage/SBR
1942.2 D6+2: +7.557 - 7.556 = +0.001 IPC damage/SBR

SBR HR: 2 StBs A1 doing SBR against 2 intercepting Fgs D2
D6+2 (First target: StB A1fs =2AA@1): +9.954 - 9.556 = +0.398 IPC damage/StB
G40 OOB D6+2: +10.973 - 7.334 = +3.639 IPCs damage/SBR
1942.2 D6+2: +9.954 - 9.556 = +0.398 IPC damage/StB

SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 1 intercepting Fgs D2
D6+2 (First target: StB A1fs =2AA@1): +7.754 -4.777 = +2.977 IPCs damage/SBR
G40 OOB D6+2: +7.639 - 3.667 = +3.972 IPCs damage/SBR
1942.2 D6+2: +7.639 -5.159 = +2.480 IPCs damage/SBR

SBR HR: 2 StBs A1 doing SBR against 1 intercepting Fgs D2
D6+2 (First target: StB A1fs =2AA@1): +9.561 - 6.778 = +2.783 IPCs damage/SBR
G40 OOB D6+2: +11.459 - 5.666 = +5.793 IPCs damage/SBR
1942.2 D6+2: +11.162 - 6.315 = +4.847 IPCs damage/SBR

SBR HRules : 2 StBs doing SBR without interceptor
D6+2 (avg 5.5 IPCs): +9.166 - 4 = +5.166 IPCs damage/SBR
OOB G40 D6+2: +9.166 - 4 = +5.166 IPCs damage/SBR
1942.2 D6+2: +9.166 - 4 = +5.166 IPCs damage/SBR

G40 SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 3 intercepting Fgs D2
1D6+2: +8.395 - 11.630 = -3.235 IPC damage/SBR / -2.988 IPC damage/SBR

G40 SBR HR: 1 StB A1 & 1 Fg A2 doing SBR against 3 intercepting Fgs D2

StB+Fg rolls/interceptors Fgs roll/ AAA roll = odds casualties
2/3656/2166/6 = 672/46656 1 Fg and 1 StB killed by Fgs vs 2 Fgs
2/3696/2161/6 = 192/46656 1 Fg killed and 1 StB killed by AAA vs 2 Fgs
2/3696/2165/6 = 960/46656 1 Fg killed vs 2 Fgs
2/3664/2161/6 = 128/46656 1 StB killed by AAA vs 2 Fgs
2/3664/2165/6 = 640/46656 no casualty vs 2 Fgs

14/3656/2166/6 = 4704/46656 1 Fg and 1 StB killed by Fgs vs 1 Fg
14/3696/2161/6 = 1344/46656 1 Fg and 1 StB killed by AAA vs 1 Fg
14/3696/2165/6 = 6720/46656 1 Fg vs 1 Fg
14/3664/2161/6= 896/46656 1 StB killed by AAA vs 1 Fg
14/3664/2165/6 = 4480/46656 no casualty vs 1 Fg

20/3656/2166/6 = 6720/46656 1 Fg and 1 StB killed by Fg vs no casualty
20/3696/2161/6 = 1920/46656 1 Fg and 1 StB killed by AAA vs no casualty
20/3696/2165/6 = 9600/46656 1 Fg vs no casualty
20/3664/2161/6 = 1280/46656 1 StB killed by AAA vs no casualty
20/3664/2165/6 = 6400/46656 no casualty at all

Results:
Bombard on IC: 28800/46656= 61.728%* ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 3.395 IPCs
Killing 2 Fgs: 2592/46656= 5.556%+20 IPCs = + 1.111 IPC
Killing 1 Fg: 18144/46656= 38.889% +10 IPCs = + 3.889 IPCs
Fg killed: 17280/46656= 37.037%-10 IPCs = - 3.704 IPCs
StB killed: 2304/46656= 4.938%-12 IPCs = - 0.593 IPCs
StB & Fg killed: 15552/46656= 33.333%*-22 IPCs = - 7.333 IPCs

/ Damage by 1 StB killed by AAA: 5760/46656 = + 12.346% * x =
*3.5 IPCs = +2.160 / +1 IPC = +0.123 IPC
*4.5 IPCs = +2.778 / +1 IPC = +0.123 IPC
*5.5 IPCs = +3.395 / +2 IPCs = +0.247 IPC
*6.5 IPCs = +4.012 / +3 IPCs = +0.370 IPC
*7.0 IPCs = +4.321 / +3 IPCs = +0.370 IPC

Regular SBRs  with special HR bonus damage to IC when 1 StB is killed by IC’s AAA
1D6: +7.160 - 11.630 = -4.470 IPCs damage/SBR / -4.347 IPC damage/SBR
1D6+1: +7.778 - 11.630 = -3.852 IPC damage/SBR / -3.729 IPCs damage/SBR
1D6+2: +8.395 - 11.630 = -3.235 IPC damage/SBR / -2.988 IPC damage/SBR
1D6+3: +9.012 - 11.630 = -2.618 IPCs damage/SBR / -2.248 IPCs damage/SBR
2D6: +9.321 - 11.630 = -2.309 IPCs damage/SBR / -1.939 IPCs damage/SBR

@Baron:

@oztea:

Totally different suggestion I have been considering.
Bombers ALWAYS do their +2 damage, even if hit by AAA.
To make SBR more attractive.

You could consider this rule to offset your beefing up of fighters.

From a realistic standpoint it has always been gut-wrenching to send over 2 bombers and get snake-eyed. Knowing that you just sent over probably 1000 bombers and not a single bomb fell on anything important.

Bombers ALWAYS do their +2 damage, even if hit by AAA.
Do you also imply when destroyed by interceptors, Bombers can still do +2 damage?

After a fast review, I think I would add your idea as integrated part of the above SBR HR, since it has a small statistical impact (approx. 3,00 IPCs/SBR instead of 2,583 IPCs/SBR.)

I would keep the +2 damage only if hit by AAA exclusively, when an interceptor hit bombers, it is destroyed with no compensation.
That way, it would provide an additional incentive to intercept bombers to wholy protect IC.
And this is a double lever effect.
Attacker will more willingly commit bombers and defender will be more incline to throw fighters against them.
And this is in addition to the fact, that interceptor’s hit must be on bombers first.
It is a much more interesting target.

2 IPCs even for a destroyed Strategic bomber is not so overpowered, if we consider that SBR should be the main use of Bombers.
In regular combat, a bomber is rarely bring alone. There is usually fodder to fight against ground units.
An attack @4 out of 6 against 1 infantry at 3 IPCs give 4/6*3= 2 IPCs.
This means that a bomber on average is able to destroy 2 IPCs in a single combat, and there is often more than 1 combat round, to the contrary of SBR.

So, there is many interesting good points in your idea oztea, and it doesn’t require to change radically SBR to add into already working optimized SBR values.
The table above showed that even Fgs A2 D2 in air-to-air combat can stay within the, generous, parameters of G40 OOB SBR.