TripleA engine - Known rules-related bugs/issues

To prevent from duplicates and to always have an up to date overview of currently unresolved (rules-related) bugs/issues of wwII-games, I have collected the respective engine-related Github-issues to list them here.
I am focussing on Github here, as all related content has been approved, so that the issues qualify.

So this topic serves as sort of inventory for everybody who is interested in the current status.

Note: In case an issue is marked as “closed” (on Github) this does not imply that it has been resolved.

I can’t guarantee that this list is complete, due to the masses of opened and closed issues, but I will try to keep it updated. This list does not contain bugs that have not been documented by a Github issue yet.

Also this list will be checked against the latest pre-releases. So issues not appearing here might be fixed for pre-releases but not for the latest stable.

In case I might have missed any change here please give me a note and I will update this topic accordingly.

If you discover new issues please report them on Github:
https://github.com/triplea-game/triplea/issues

Rules Issues on GitHub (this list does not include issues filed at the map repos):

1. Unresolved issues

Sub combat rules wrong:
(example see https://www.axisandallies.org/forums/post/1249085)
https://github.com/triplea-game/triplea/issues/1645

v5-1942 air battles not supported:
https://github.com/triplea-game/triplea/issues/1867

Should Be Able To Retreat To SZ With Only Enemy Subs (>=V3):
https://github.com/triplea-game/triplea/issues/3428

Display Overbuy Rule to Game Players:
https://github.com/triplea-game/triplea/issues/3767

Incorrect handling of AA-fire and/or AA-fire casualty selection:
https://github.com/triplea-game/triplea/issues/4133

Kamikazes don’t kill marines on board:
https://github.com/triplea-game/triplea/issues/4634

Can blitz through a friendly neutral. Should not be possible:
https://github.com/triplea-game/triplea/issues/4685

Rule problem: should not offer option to retreat:
https://github.com/triplea-game/triplea/issues/4688

Allied Air Units Cannot Be Taken as Casualties Offensively (v1):
https://github.com/triplea-game/triplea/issues/4794

Submarine submerge and retreat issues:
https://github.com/triplea-game/triplea/issues/4821

V4 [and others] Should [not] give refund for an overbuy:
https://github.com/triplea-game/triplea/issues/5194

Anniversary AAA/Paratrooper issue:
https://github.com/triplea-game/triplea/issues/5834

Battle calculator in Global 1940 incorrectly distinguishes UK-pacific from British units:
https://github.com/triplea-game/triplea/issues/5844

Non Combat Move Unloading From Transports Unloaded During Combat Move (v2):
https://github.com/triplea-game/triplea/issues/6039

Placement on friendly carrier is incorrectly allowed:
https://github.com/triplea-game/triplea/issues/6238

TripleA allows NCM-landing in territories that have not been friendly at the start of the turn:
https://github.com/triplea-game/triplea/issues/7350

Transports allowed to load and move in Combat phase then offload in Non-combat phase:
https://github.com/triplea-game/triplea/issues/9067

Attacking naval should be able to ignore transports if they are loaded or not
https://github.com/orgs/triplea-game/projects/3/views/1?pane=issue&itemId=66648743

2. Partly resolved issues

Rocket attacks and Scrambling resolved during wrong phases:
https://github.com/triplea-game/triplea/issues/3846
(solved for G40; there are remaining aspects (e.g. v1))

TripleA illegally allows placement of newly built air units on friendly carriers:
https://github.com/triplea-game/triplea/issues/4480

3. Resolved issues

Incorrect transports already unloaded error message:
https://github.com/triplea-game/triplea/issues/874

Incorrect handling of Transport’s “stalemate”:
https://github.com/triplea-game/triplea/issues/2367

Transport loading bug (rules):
https://github.com/triplea-game/triplea/issues/3162

Can’t remove transported units without removing transport:
https://github.com/triplea-game/triplea/issues/4446

Aircraft casualties should take those with least move pts:
https://github.com/triplea-game/triplea/issues/6256

@redrum Thank you for your feedback and your suggestions. I will do some rework accordingly, soon.

@simon33 said in TripleA engine - Known rules-related bugs/issues:

Don’t forget mechs and tanks being able to pass through (blitz) through friendly neutrals, which they shouldn’t be able to do.

Which issue number is that? I will be happy to add this issue to the list.

This ignores added features which may be more important.

That is not the purpose of this list. My intention - as explained above - is to keep track on unresolved rules issues.

We can have a separate topic that lists features of course. Feel free to start it.
However we of course already do have this: https://triplea-game.org/release_notes/

@simon33 Thanks!

@simon33 said in TripleA engine - Known rules-related bugs/issues:

What about the retreat rules? Issue #1270. #2080 was reverted due to performance problems in #2544. So there’s still problems - if you attack and only have a transport or an AA Gun defending, you are still permitted a retreat.

Perfect! That is exactly what this topic is intended for: Those aspects simply get lost, if they aren’t listed anywhere and brought back to attention.

However, @simon33 , I retested the scenarios stated in #1270 (with 1.10.prerelease) and found only the “defending AA-gun scenario” not working correctly again:
defTrp.tsvg
defSub.tsvg
defAA.tsvg

The transport had correctly been autodestroyed and no retreat option was offered in my test.
The battle involving the defending submarine facing attacking fighters had been correctly ended without offering a retreat option, too.
But the remaining infantry facing a defending AA-gun only had incorrectly been offered the option to retreat.

Would you please verify? Meanwhile I have opened https://github.com/triplea-game/triplea/issues/4688 for it, referring to #1270.

@simon33 Right, in that case the subs are incorrectly given that option. I have edited the issue accordingly. Thanks!

The “defending sub case” is special because here the battle ends without autodestruction. In the context of #1270 a retreat option had been given, as far as I remember.
The savegames work fine here, maybe you mixed 1.9/1.10 versions?

@redrum Thank you. I have updated the first posting.

@simon33 Indeed. The above list is up to date. Can’t you try and fix it?