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Atomic chess, stockfish moves while in check #2453

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matgaj opened this issue Mar 30, 2024 · 1 comment
Open

Atomic chess, stockfish moves while in check #2453

matgaj opened this issue Mar 30, 2024 · 1 comment
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@matgaj
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matgaj commented Mar 30, 2024

What happened?

Stockfish made a move while under check, exploding my king, while its king was still under check from my knight

How can we reproduce the bug?

Here’s the PGN:
[Event "Casual Atomic game"]
[Site "https://lichess.org/F797vIER"]
[Date "2024.03.30"]
[White "bbazil"]
[Black "lichess AI level 3"]
[Result "0-1"]
[UTCDate "2024.03.30"]
[UTCTime "19:31:03"]
[WhiteElo "1500"]
[BlackElo "?"]
[Variant "Atomic"]
[TimeControl "-"]
[ECO "?"]
[Opening "?"]
[Termination "Normal"]
[Annotator "lichess.org"]

  1. Nc3 c6 2. e4 Nf6 3. g4 d5 4. Qe2 Qb6 5. d4 Qa6 6. Nb5 h5 7. Nc7+ Qxe2# { Game ends by variant rule. } 0-1

Expected behavior

Opponent is forced to escape check before making any other move

Device

iPhone 12

Operating system

17.4.1

App version

v8.0.0

Screenshots

IMG_5443
IMG_5444
IMG_5445

Additional context

No response

@matgaj matgaj added the bug label Mar 30, 2024
@matgaj matgaj changed the title Atomic chess, stockfish moves while in chech Atomic chess, stockfish moves while in check Mar 30, 2024
@randompearl-stack
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This is not a bug, it is how the variant was intended to be played. https://lichess.org/variant/atomic

Traditional checkmate applies to atomic as well, but any move that results in blowing up the opposite king will result in an immediate victory, overriding all checks and checkmates.

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