Bombing by Average

@barnee

Unfortunately, I couldn’t find anything from Der Kuenstler. Here is the piece Gen Manstein was talking about:

https://www.historicalboardgaming.com/Atom-Bomb-3D-Printed-x5_p_3707.html

Good to see you back. Thanks for reply. I do have what your talking about on old map and my new map. Axis control Belgian Congo receive 4 icps. Other 3 is from USA.
We don’t have the atom bomb but allies get to start game with these 4 icps but axis can get it too. Just a small house rule anyway.
97605C85-9FA0-46E4-A372-E0EC9899C0C6.jpeg C9D9ED4D-6642-42EB-BDC7-93A951074384.jpeg

1942.2 SBR Black Elk hypothesis

Strategic Bomber
Attack 0
Damage 1D6, 1D6+2
Cost 5

Fighter
Attack 1
Defense 2
Cost 10

Break even point StB A0 C5, 1D6+2 damage vs Fg A1 D2:  21 StBs vs 30 Fgs: 0.700 StB/Fg
1StB D6+2 vs 1Fg D2: + 3.056 - 2.222= + 0.834 IPC damage/SBR12= +10.008
1StB D6+2 vs 2Fgs D2: +2.037 - 3.148 = -1.111 IPC damage/SBR9= -9.999 (Diff.: +0.009)
21 StB vs 30 Fgs:   0.700 StB/Fg
No FIT (Fighter Interception Threshold), always beneficial to Intercept.

Break even point StB A0 C5, 1D6 damage vs Fg A1 D2: 17 StBs vs 15 Fgs: 1.133 StBs/Fg
1 StB D6  vs 1Fg D2: + 1.944 - 2.222 = -0.278 IPC damage/SBR13 = -3.614
2 StBs D6 vs 1Fg D2: +4.861 - 3.056= +1.805 IPCs damage/SBR2= +3.610 (Diff.: -0.004)
17 StBs vs 15 Fgs: 1.133 StBs/Fgs
No FIT (Fighter Interception Threshold), always beneficial to Intercept.

Down below here is a different values doing SBR for 1942.2 and G40

Strategic Bomber in air-to-air combat SBR:
Attack 0
Bombard IC damage: D6 or 1D6+2

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

IC’s AAA: @1 against each Strategic Bomber

1942.2 SBR HRules with StB A0 and Fg A1 D1 : damage 1D6 or 1D6+2

1 Strategic Bomber doing SBR against no interceptor

AAA roll = odds casualties

5/6 StB survived * 5.5 IPCs = +4.583 IPCs *3.5= +2.917
1/6 StB killed *5 IPCs = -0.833 IPCs

D6: +2.917-0.833= +2.084 IPCs
D6+2: + 4.583 - 0.833 = +3.750 IPCs damage/SBR

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

Interceptor Fg roll/ AAA roll = odds casualties

2/66/6 = 12/36 1 StB killed by Fg
4/61/6 = 4/36 1 StB killed by AAA
4/6*5/6 = 20/36 No casualty at all.

Results:
Bombard on IC 20/36* ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 3.056 IPCs *3.5=+1.944
StB killed 16/36 *-5 IPCs = - 2.222 IPCs
1D6 vs 1D2: + 1.944 - 2.222 = -0.278
1D6+2 vs 1D2: + 3.056 - 2.222= + 0.834 IPC damage/SBR

D6 vs Fg D1: + 2.431 - 1.528 = +0.903
D6+2 vs Fg D1: + 3.819 - 1.528= + 2.291 IPC damage/SBR

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

Interceptors Fgs roll/ AAA roll = odds casualties

20/366/6 = 120/216 1 StB killed by Fg
16/361/6 = 16/216 1 StB killed by AAA
16/36*5/6 = 80/216 No casualty at all.

Results:
Bombard on IC 80/216* ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = +2.037 IPCs *3.5= +1.296
StB killed 136/216 *- 5 IPCs = -3.148 IPCs
D6 vs D2: +1.296 - 3.148 =-1.852 IPCs
D6+2 vs D2: +2.037 - 3.148 = -1.111 IPC damage/SBR

D6 vs Fg D1: + 2.025 - 2.106 = -0.081 IPCs
D6+2 vs Fg D1 : + 3.183 - 2.106 = +1.077 IPC damage/SBR

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

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

1/64/366/6 = 24/1296 1 Fg and 1 StB killed by Fgs vs 1 Fg
1/616/361/6= 16/1296 1 Fg killed by Fg and 1 StB killed by AAA vs 1 Fg
1/616/365/6= 80/1296 1 Fg 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

5/64/366/6 = 120/1296 1 Fg and 1 StB killed by Fg vs no casualty
5/616/361/6 = 80/1296 1 Fg killed by Fg and 1 StB killed by AAA vs no casualty
5/616/365/6= 400/1296 1 Fg 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: 960/1296 * ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 4.074 IPCs 3.5= +2.593
Killing 1 Fg: 216/1296 +10 IPCs = + 1.667 IPCs
Fg killed: 480/1296-10 IPCs = - 3.704 IPCs
StB killed: 96/1296 -5 IPCs = - 0.370 IPCs
StB & Fg killed: 240/1296* -15 IPCs = - 2.778 IPCs

D6 vs 2Fgs D2: +4.260 - 6.852 = -2.592 IPCs
D6+2 vs 2Fgs D2: + 5.741 - 6.852 = -1.111 IPCs damage/SBR

D6 vs D1: +4.503 - 1.690 = +2.813 IPCs
D6+2 vs D1: + 6.123 - 1.690 = + 4.433 IPCs damage/SBR

1 Fighter Att 1 and 1 Strategic Bomber Att 0 doing SBR against 1 interceptor Def 2
Fighter escort taking the casualty.
Fighter roll/interceptor Fg roll/ AAA roll = odds casualties

1/62/61/6= 2/216 1 Fg killed by Fg and 1 StB killed by AAA vs 1 Fg
1/62/65/6= 10/216 1 Fg killed by Fg vs 1 Fg
1/64/61/6 = 4/216 1 StB killed by AAA vs 1 Fg
1/64/65/6 = 20/216 No casualty vs 1 Fg

5/62/61/6 = 10/216 1 Fg killed by Fg and 1 StB killed by AAA vs no casualty
5/62/65/6 = 50/216 1 Fg killed by Fg vs no casualty
5/64/61/6 = 20/216 1 StB killed by AAA vs no casualty
5/64/65/6 = 100/216 no casualty at all

Results:
Bombard on IC: 180/216 * ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 4.583 IPCs 3.5= +2.917
Killing 1 Fg: 36/216 +10 IPCs = + 1.667 IPCs
Fg killed:60/216-10 IPCs = -2.778 IPCs
StB killed: 24/216 -5 IPCs = - 0.555 IPCs
StB & Fg killed: 12/216* -15 IPCs = -0.833 IPC

1Fg A1 1StB D6 vs 1 Fg D2: +4.583 - 4.166 = +0.418 IPCs
1Fg A1 1StB D6+2 vs 1 Fg D2: + 6.250 - 4.166 = + 2.084 IPCs damage/SBR

1Fg A1 1StB D6: +2.500 - 1.111 = +1.389 IPCs
1Fg A1 1StB D6+2: + 6.250 - 1.111 = + 5.139 IPCs damage/SBR

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

Interceptor Fgs roll/ AAA roll = odds casualties

4/3636/36= 144/1296 2 StBs killed by Fgs
16/366/36 = 96/1296 1 StB killed by Fg and 1 StB killed by AAA
16/36*30/36= 480/1296 1 StB killed by Fg

16/361/36 = 16/1296 2 StBs killed by AAA
16/3610/36 = 160/1296 1 StB killed by AAA
16/36*25/36 = 400/1296 No casualty at all.

Results:
2x Bombard on IC 400/1296* ((2+4)+(12+4) IPCs)/2= +11 IPCs) = +3.395 IPCs 7=+2.160
1x Bombard on IC 640/1296 ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 2.716 IPCs 3.5=+1.728
2 StBs killed 256/1296 -10 IPCs = -1.975 IPCs
1 StB killed 640/1296* -5 IPCs = -2.469 IPCs
D6 vs 2 Fgs D2: +3.888 - 4.444 =-0.556 IPCs
D6+2 vs 2Fgs D2: +6.111 - 4.444 = +1.667 IPCs damage/SBR

D6 vs 2 Fgs D1: +4.863 - 3.056 = +1.807 IPCs
D6+2 vs 2Fgs D1: + 7.639 - 3.056 = + 4.583 IPCs damage/SBR

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

Interceptor Fg roll/ AAA roll = odds casualties

2/66/36 = 12/216 1 StB killed by Fg and 1 StB killed by AAA
2/630/36= 60/216 1 StB killed by Fg
4/61/36 = 4/216 2 StBs killed by AAA
4/610/36 = 40/216 1 StB killed by AAA
4/6*25/36 = 100/216 No casualty at all.

Results:
2x Bombard on IC 100/216* ((2+4)+(12+4) IPCs)/2= +11 IPCs) = +5.093 IPCs 7=+3.241
1x Bombard on IC 100/216 ((1+2)+(6+2) IPCs)/2= +5.5 IPCs) = + 2.546 IPCs 3.5=+1.620
2 StBs killed 16/216 -10 IPCs = -0.741 IPC
1 StB killed 100/216* -5 IPCs = -2.315 IPCs

2 StBs D6 vs 1 Fg D2: +4.861 - 3.056= +1.805 IPCs
2 StBs D6+2 vs 1 Fg D2: +7.639 - 3.056 = +4.583 IPCs damage/SBR

2 StBs D6 vs 1 Fg D1: +5.347 - 2.361= +2.986 IPCs
2 StBs D6+2 vs 1 Fg D1: +8.403 - 2.361 = +6.042 IPCs damage/SBR

@Baron:

Summary:
StB A0 C12 vs Fg A1 C10
1 Strategic Bomber doing SBR against no interceptor
D6+2: + 4.583 - 2 = +2.583 IPCs damage/SBR run
D6: +2.917-2= 0.917 IPCs

1 Strategic Bomber A0 doing SBR against 1 interceptor D1
D6+2: + 3.819 - 3.667 = + 0.152 IPC damage/SBR run
D6: + 2.431 - 3.667 = -1.236

1 Strategic Bomber A0 doing SBR against 2 interceptors D1
D6+2: + 3.183 - 5.056 = - 1.873 IPCs damage/SBR run
D6: + 2.025 - 5.056 = -3.031 IPCs

1 Fighter A1 and 1 Strategic Bomber A0 doing SBR against 2 interceptors D1
D6+2: + 6.123 - 5.334 = + 0.789 IPC damage/SBR run
D6: +4.503 - 5.334 = -0.831 IPCs

2 Strategic Bombers A0 doing SBR against 2 interceptors D1
D6+2: + 7.639 - 7.334 = + 0.305 IPC damage/SBR run
D6: +4.863 - 7.334= -2.471 IPCs

1 Fighter A1 and 1 Strategic Bomber A0 doing SBR against 1 interceptor D1
D6+2: + 6.250 - 3.667 = + 2.583 IPCs damage/SBR run
D6: +2.500 - 3.667 = -1.167 IPCs

2 Strategic Bombers A0 doing SBR against 1 interceptor D1
D6+2: + 8.403 - 5.666 = + 2.737 IPCs damage/SBR
D6: + 5.347 -5.666= -0.319 IPCs

Comparison of this HR with Triple A SBR for 1942.2

1942.2 SBR HRules with StB A0 and Fg A1 D1 : damage 1D6+2   Triple A SBR for 1942.2: damage 1D6

1 Strategic Bomber doing SBR against no interceptor             1 StB doing SBR without interceptor
Sum: + 4.583 - 2 = +2.583 IPCs damage/SBR run                Sum: +2.917 - 2 = +0.917 IPC damage/SBR run

1 Strategic Bomber A0 doing SBR against 1 interceptor D1     1 StB A1 against 1 Fg D1
Sum: + 3.819 - 3.667 = + 0.152 IPC. damage/SBR run        Sum: +3.69 - 3.667 = + 0.023 IPC damage/SBR run

1 Strategic Bomber A0 doing SBR against 2 interceptors D1       1 StB A1 doing SBR against 2 intercepting Fgs D1
Sum: + 3.183 - 5.056 = - 1.873 IPC. damage/SBR run              Sum: + 2.025 - 5.056 = - 3.031 IPCs damage/SBR run

1 Fighter A1 and 1 Strategic Bomber A0 doing SBR against 2 interceptors D1       1 StB & 1 Fg A1 doing SBR against 2 intercepting Fgs D1
Sum: + 6.123 - 5.334 = + 0.789 IPC damage/SBR run              Sum: +6.155 - 5.33 = + 0.825 IPC damage/SBR run

2 Strategic Bombers A0 doing SBR against 2 interceptors D1         2 StBs A1 doing SBR against 2 intercepting Fgs D1
Sum: + 7.639 - 7.334 = + 0.305 IPCs damage/SBR run              Sum: +8.195 - 7.334 = + 0.861 IPC damage/SBR run

1 Fighter A1 and 1 Strategic Bomber A0 doing SBR against 1 interceptor D1       1 StB & 1 Fg A1 doing SBR against 1 intercepting Fg D1
Sum: + 6.250 - 3.667 = + 2.583 IPC damage/SBR run         Sum: + 5.973 - 3.667 = + 2.306 IPCs damage/SBR run

2 Strategic Bombers A0 doing SBR against 1 interceptor D1         2 StBs A1 doing SBR against 1 intercepting Fg D1
Sum: + 8.403 - 5.666 = + 2.737 IPCs damage/SBR run         Sum: +8.403 - 5.666 = + 2.737 IPCs damage/StB

@toblerone77:

I’m just going to say something here. Excluding your math Baron. The whole point of this rule was to open up a way for SBR against ICs with a loose historical basis. The loose historical depiction of night bombing was to give the attacker a less risky SBR but the penalty was less risk=less reward.

Given the basic concept, I think it is viable. I liked the idea of night fighters but thought it best to drop them. That’s my POV. An SBR that drops interceptors/escort could simulate this simply.

I encourage everyone to post as they like. Personally I like the idea of simply eliminating escorts and interceptors for night raids and reducing AA fire 1@D12. Damage totals are halved. That’s just what I like.

Everyone else, carry on.

Hi Toblerone77,
I don’t know if you play 1942 second edition, but within the optional rule for SBR escort and interception it becomes viable to have such thing as StB playing a role as Night-fighter, because the odds are clearly different from G40 during the regular SBR with escort: all Fgs and StB A1 first strike, while Fg D2.

All you have to do to implement a 1942.2 Night bombing & Night Fighter HR is this when playing with escort and interception optional rule:

Day SBR damage on IC becomes 1D6+2/StB, instead of just D6.

During 1942.2 Night SBR, the damage becomes D6-1/StB (or D6+2 halved rounding down, if you prefer).

In addition, all attacking StBs and defending StB Night-fighters roll a regular A/D@1, same as G40 SBR escort and interception rule.

The AAA fire @1 in both cases, Day or Night SBRs.

These 2 things will make all the basics 1:1, StB vs Fg/StB Night Fg, balance.

Day SBR:
StB vs AAA, damage + 4.583 - casualty 2.0 = +2.583 IPC damage/StB
StB vs Fg+AAA,  damage + 4.977 - casualty 4.777 = + 0.2 IPC damage/StB

Night SBR:
StB vs AAA, damage +2.083 - casualty 2.0 = +.083 IPC damage/StB
StB vs StB NF+AAA, damage +3.736 - casualty 3.667 = + 0.069 IPCs damage/StB run

So, Night SBR is better when there is more than 1 Fg defending an IC, and it is still an even match for both sides (near 0 IPC) to throw 1 StB against a StB NightF.

But, if there is only 1 Fg on the IC, the Day SBR is still positively better (.2 vs .069).

In addition, there is less StB and money in 1942.2 compared to G40, so there is lesser chance that StBs presence will forbids any Night SBR.

To summarize the viable SBR tactics with this 1942.2 HR:

No Fgs on IC, go for Day-SBR 2 or more Fgs on IC, go for Night-SBR unless there is more than 1 Night-Fg for 1 StB raider. Keeping a 1 Fg + (1 StB :1 Fg) advantage for Day bombing is better. Or staying within the 1 StB and 1 Fg vs 2 Fgs is the lower limit, it is still viable around 0.00 IPC/StB run.
So, going 1:1 vs Day or Night is almost the same risks involved, but with less damage & casualty in Night SBR.

What do you think of this?

Now, Night Bombing can be viable in both games.

Here is the calculation basis for this 1942.2 Night bombing with Night Fgs House Rule:

OOB 1942.2: 1 StB doing SBR without interceptor
5/6 StB survived * 3.5 IPCs = 2.9 IPCs
1/6 StB killed *12 IPCs = -2 IPCs
Sum: 2.9 - 2 = +.9 IPC damage/StB

OOB 1942.2 SBR with D6 damage:
1 StB A1 first strike against 1 intercepting Fg D2

StB roll (D6)/Fg roll / AAA roll

161= 6/216 1 StB killed by AAA vs 1 Fg killed: 2.78%
165= 30/216 no casualty vs 1 Fg killed: 13.89%

526= 60/216 StB killed by Fg: 27.78%
541= 20/216 StB killed by AAA: 9.25%
545= 100/216 both survived: 46.3%

Results with :
60.19% * ((1+6) IPCs)/2= +3.5 IPCs) = 2.107 IPCs
16.67% killing Fg *+10 IPC = + 1.667 IPC
39.81% StB killed *-12 IPCs = - 4.777 IPCs

Sum: 3.774 - 4.777 = - 1.0 IPC damage/StB

1942.2 HR damage D6+2 : 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 - 2.0 = +2.583 IPC damage/StB

1942.2 SBR HR with D6+2 damage:
1 StB A1 first strike against 1 intercepting Fg D2

StB roll (D6)/Fg roll / AAA roll

161= 6/216 1 StB killed by AAA vs 1 Fg killed: 2.78%
165= 30/216 no casualty vs 1 Fg killed: 13.89%

526= 60/216 StB killed by Fg: 27.78%
541= 20/216 StB killed by AAA: 9.25%
545= 100/216 both survived: 46.3%

Results with :
60.19% * ((1+2) + (6+2) IPCs)/2= +5.5 IPCs) = 3.31 IPCs
16.67% killing Fg *+10 IPC = + 1.667 IPC
39.81% StB killed *-12 IPCs = - 4.777 IPCs
Sum: 4.977 - 4.777 = + 0.2 IPC damage/StB

HR for 1942 with StB as Nightfighter interceptor all A1/D1 as in G40 interception rule, damage at D6-1:

1 StB A1 vs 1 StB D1 doing interception

StB roll /Fg roll / AAA roll

116= 6/216 1 StB killed by StB NF vs 1 StB NF killed: 2.78%
151= 5/216 1 StB killed by AAA vs 1 StB NF killed: 2.31%
155= 25/216 no casualty vs 1 StB NF killed: 11.57%

516= 30/216 StB killed by StB NF: 13.89%
551= 25/216 StB killed by AAA: 11.57%
555= 125/216 both survived: 57.87%

Results:
69.44% * ((0+5) IPCs)/2= + 2.5 IPCs) = 1.736 IPCs
16.67% killing StBNFg *+12 IPCs = + 2.00 IPC
30.55% StB killed *-12 IPCs = - 3.667 IPCs

Sum: 3.736 - 3.667 = + 0.069 IPCs damage/StB run

1942.2 HR damage D6-1: 1 StB doing SBR without interceptor
5/6 StB survived * 2.5 IPCs = 2.083 IPCs
1/6 StB killed *12 IPCs = -2 IPCs
Sum: +2.083 - 2 = +.083 IPC damage/StB

1942.2, damage D6+2: 1 StB & 1 Fg A1 first strike doing Day-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% * ((1+2)+(6+2) 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 - 7.564 = - 0.01 IPCs damage/StB

I will summarize 3 ways of doing G40 SBR with Fgs escort and interceptor which could be use as 3 different historical tactics by the attacker trying to whether reduce the enemy’s air power or the IC production while better protecting StBs.

First, is A) the Close-Escort Mission, which is done as OOB SBR.

Second, is B) the Offensive Counter-Air Mission, which gives Fgs A1 first strike and D1 but an opportunity to roll a second time against bombers in A-to-A dogfight.

Third, is C) the Night Bombing Mission, in which Fgs units cannot participate neither offense nor defense.

A) Close-Escort Mission, as OOB
Air-to-Air phase
All attacking planes (Fg,TcB, StB) inside roll A@1.
All defending Fgs roll D@1.
Remove casualties.

Bombing phase
Proceed to SBR over IC, NB or AB.
AAA fires @1 against StB and TcB
Then roll damage as OOB: StB D6+2, TcB D6.

B) the Offensive Counter-Air Mission, Fgs are actively chasing intercepting Fgs
Air-to-Air phase
First cycle:
All attacking Fgs can roll A@1. Remove casualties.
All other attacking planes (TcBs, StBs) roll A@1.
All defending Fgs roll D@1.
Remove casualties.

Second cycle:
Then, defending Fgs roll D@1 a second time inside the A-to-A phase.
And all hits in this second cycle are allocated first to bombers, if any. Remove casualties.
All surviving attacking Fgs can now roll A@1 in this second cycle. Remove casualties.

Bombing phase
Proceed to SBR over IC, NB or AB.
AAA fires @1 against StB and TcB
Then roll damage as OOB: StB D6+2, TcB D6.

C) the Night Bombing Mission

Night Bombing phase
Proceed directly to SBR over IC, NB or AB.

AAA fires @1/D12 against StB and TcB or
@Baron:

“Historical” light projector “search and spot” in the night sky:
Each StB/TcB is spotted on a 3 or less.

Then roll to A@1 on spotted StB with AA gun: on “1” roll a spotted StB/TcB is destroyed.
(Work as the usual in-built AAA in IC.)

All surviving StBs bombard roll for damage: (1D6+2)/2 rounded down against IC.

All surviving TcBs bombard roll for damage (1D6)/2 rounded down, minimum 1 IPC, against IC.

@Baron:

Trying to depict the two escorting fighters tactics with an additional HR inside the actual G40 OOB SBR escort and interception rules, I come to this:
It would be an attacker’s choice whether he chooses the close-escort mission or an Offensive Counter-Air mission.

Close-escort mission:
When playing as OOB SBR (all @1), it is like Fgs are providing close-escort to bombers.

Offensive Counter-Air mission version A:
Air-to-Air combat phase in SBR with Fgs actively chasing intercepting Fgs :
All attacking Fgs can roll A@1. Remove casualties.
All other planes (TcBs, StBs and defending Fgs) roll A/D @1. Remove casualties.
Then, defending Fgs roll D@1 a second cycle inside the A-to-A phase.
And all hits in this second cycle are allocated to bombers. Remove casualties.

Proceed to SBR over IC, NB or AB.
AAA fires against StB and TcB.
Then roll damage as OOB.

I think it is a way to simulate the two tactics at a Strategical level game.
It can give a better historical feel and variation of attacking SBR strategy, at least on this point, than just the actual OOB.
Attacking Fighters get a preemptive strike, and any hit is also a way of protecting bombers,
while defending Fgs get special treatment on the second cycle: a second chance to make a hit @1 on bombers specifically.

In addition, maybe the comparison can provide us a way to explain why Fgs are not better than bombers and stay A/D @1:

the escorts are restricted in their role, they have limited ability to score hits, however, by staying close to the bombers they make it more likely that they will be taken as a casualty, the losing player gets to decide their losses.

If on the other hand, the escorts are allowed to pursue interceptors, they are more effective at shooting them down, but in that case, they are not as effective at protecting the bombers, therefore, the interceptors get to choose their hits.

On one part, we can say that for escorting Fgs providing cover impaired all of them, moving at a slower pace and keeping an eye on bombers.
On the other part, defending interceptors are also somewhat impaired by the defensive formation of Bombers and Fgs, so they didn’t get any advantage of the “flying over homeland territory” would normally provide against less manoeuvrable target.
So, after all, Fgs get A1D1 while the rest of TcBs and StBs just getting A1 but D0.
(And based upon IPC cost, it is just enough to say a Fg unit is slightly better than the rest.)

In summary, about Offensive Counter-Air mission :
The first cycle is a regular for defending planes, because they have to scramble and can be caught off guard by attacking Fgs. They get the superiority once in the air.

The first cycle of SBR interception phase is as OOB, except for attacking Fgs.
The second cycle is for surviving defending Fgs which get an advantage since there is no close-escort Fgs for Bombers.

In addition, this can provide a distinctive ability toward Fgs vs TcBs.

This HR was only a way to depict in game term this historical tactics, but if there is already a way to rationalize it inside OOB rules, feel free to develop it, so it can add a layer of historical depiction and feeling toward Fighter unit.

EDIT:
Here is another way of depicting this Offensive Counter Air-Mission version B:

What could happened historically?
A typical example from the Battle of Britain:
A flight of Ju88, He111 and Do17 Bombers sent in to bomb British ABs with a group of 109’s in support.
A group of Spitfires and Hurricanes comes up to intercept.
The 109s jump the interceptors.
The interceptors try to blow by the escorts and get at the bombers.

Escorts are flying in ahead of the Bombers and meet the interceptors before the wing of Bombers.

Escorts and Interceptors fight one round.
Escorts and interceptors roll on A/D@1. Remove casualties.
Then, escorting and intercepting Fgs and Bombers all roll on A/D@1. Remove casualties, but Bombers are taken as casualties.
Then, AAA fire, remove casualties.
Proceed to bombing damage.

@Uncrustable:

I think you should play some games of G40 on here before making these assumptions.
I do, and I see many SBR involving fighters.
Germany sometimes will send 5 or more bombers on Moscow alone, where Moscow has 2-3 fighters to scramble. Odds are better that Russia will lose a fighter before Germany loses a bomber in the air combat. And  Il trade a German bomber for a Russian fighter, Russia can’t afford it.
I also see many games where G2 Germany sends 2 bombers 2-4 tac bombers and 2-4 fighters to London where there are sometimes up to 5 fighters that can scramble.
Italy will also heroically send its lone bomber to London in an attempt to disable the airbase on London before Germany’s turn.

Even with interceptors SBR is a touch too powerful in G40.
This is mainly because bombers are getting +2, meaning 1 bomber auto disables bases and minor facilities once past AA and interceptors.

I would propose taking away bombers +2, while halving tacbombers damage.
Bombers SBR at 1D6
Tacbombers SBR at 1D6 /2. Rounded up.

Now I better see why you wanted to give defending interceptor D2 instead of D1.

Attacker have the advantage of picking which units will go SBR and to concentrate firepower on a single IC.

The defenders are overwhelmed by the sheer number.
In addition, on defense you have often more than just only 1 IC to protect, and you cannot keep all the Fgs in the same territory, have to split them usually.
D2 interceptors can counterweight the advantage of attacker and hindrance of defense a bit.

Reducing attacking bombers to only 1@1  for the whole group is also a way to preserved the defending fighters against destruction by a large number of StBs. But we both know, that is not A&A standard rules, each unit usually get 1 roll…

…unless you treat StBs/TcBs the same way as AAA!!!. :-o
So each defending Fgs can never have more rolled against them than 1A@1, if there is at least the same number of StB/TcBs vs Fgs.

It can be rationalized to get an historical accuracy somehow in the way:
intercepting fighters are not able to attack all groups of StBs/TcBs flying over the territory but only one unit (flight group) at a time.
When interceptors fly around StBs they are under an intense and concentrated AA fire coming from the flying fortress. But all others group of StBs are not chasing actively Interceptors, they are just flying toward the IC/AB/NB target.
So if interceptors are overwhelmed by the StBs/TcBs, it will be in essence 1:1 combat.
1 TcBs A1 vs 1 Fg D2, all other additionnal StBs/TcBs cannot shoot anymore.
In fact, all intercepting Fgs are already busy, other StBs/TcBs have pure and simple an open road toward IC or NB/AB.

What do you think of this one?
When StBs/TcBs attack fighters on SBR air combat, they get A@1 for each StB/TcB or intercepting Fgs wichever is less.

Escorting fighter attack as usual, 1 unit get 1 roll.
Based on 1942.2, I will keep @1 First Strike
Based on G40 rule, if Interceptor has D1, then A1.

(I really wonder why I haven’t think about it, even back in the old thread about StB spam strategy. :?)
http://www.axisandallies.org/forums/index.php?topic=31373.0

Just make it a NO for the US that it needs a cumulative die roll to obtain nukes

Certain things have to happen in order for the US to roll “Atomic Dice”

Allied control of Rome
No Axis controlled territories in Africa
The Axis cannot control US originally controlled territories in the Pacific (Guam, Midway, Hawaii, Johnston, Line, Philippines, Aleutian)
The Axis cannot control UK originally controlled territories in Europe (London, Scotland, Iceland, Gibraltar)
Anzac has to have collected IPC that round

Before Germany goes in that round, the US gets to roll a die for each of the following:
US Control of Rome
US Control of Hawaii
US Control of Caroline Islands
US Control of Marianas
US Control of Iwo Jima
US Control of Okinawa
US Control of Marshall Islands
France collected IPC that round
Allied Control of Egypt

You have to roll something like six sixes in order to obtain an atomic bomb.  Thats six sixes cumulatively.  Alternately, you can make it a cumulative total so something like you have to roll something like a die total of 40-50 cumulatively on the die roll(s) over multiple rounds.

Each nuke thereafter costs the US 1/3 of its IPC to purchase it (so probably something like 25-30 IPC at this point in the game).

The Nuke works just like a SBR however it can only be on the Nation’s Capital (Tokyo / Berlin).  If the StratB’s with the Nuke(s) get to the roll dice phase for damage to the Major IC, then the attack is successful.

A successful attack means that nation does not collect IPC that round.

From the German perspective:

Germany rolls a single die every round for the following objectives:

German Control for each VC it controls

So G1 would see Germany likely roll die for Berlin, Warsaw and Paris.

Germany would also be able to roll die if it controls London, Egypt, Leningrad, Stalingrad, and/or Moscow which allows for Germany to go in any direction to obtain extra die rolls.

Germany scores half (rounded down) its total die roll if the Axis does not control Paris and Rome.

Germany has to obtain the same objective as the US to obtain an Atomic Bomb (six sixes or something like 50 total showing on the dice cumulatively through all rolls).

I believe this puts the Atomic Bomb in play for Germany around turn 7-8 if it never loses Paris and owns London.  However Germany could only really play that Atomic bomb against Moscow if it sealioned G3 as its pretty darned difficult for it to launch a SBR against the US.  In effect it penalizes Moscow for sitting back and really doing nothing instead of pushing back against the Germans.

I like it. Simple and effective.