is this a bug?

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Avatar of unnamedsolder
en passant doesn't work on hardest difficulty bot A4 [Event "Vs. Computer"] [Site "Chess.com"] [Date "2024-05-16"] [White "Maximum"] [Black "unnamedsolder"] [Result "*"] [WhiteElo "3200"] [BlackElo "1217"] [TimeControl "-"] [Termination "*"] 1. e4 a5 2. d4 c6 3. Nf3 d5 4. exd5 cxd5 5. Nc3 Nc6 6. Bf4 Nf6 7. Nb5 e5 8. Nxe5 Nxe5 9. Bxe5 Bb4+ 10. c3 Bg4 11. Bxf6 Qxf6 12. Qxg4 O-O 13. cxb4 axb4 14. Be2 b3 15. a4 *
Avatar of Martin_Stahl
unnamedsolder wrote:
en passant doesn't work on hardest difficulty bot A4 [Event "Vs. Computer"] [Site "Chess.com"] [Date "2024-05-16"] [White "Maximum"] [Black "unnamedsolder"] [Result "*"] [WhiteElo "3200"] [BlackElo "1217"] [TimeControl "-"] [Termination "*"] 1. e4 a5 2. d4 c6 3. Nf3 d5 4. exd5 cxd5 5. Nc3 Nc6 6. Bf4 Nf6 7. Nb5 e5 8. Nxe5 Nxe5 9. Bxe5 Bb4+ 10. c3 Bg4 11. Bxf6 Qxf6 12. Qxg4 O-O 13. cxb4 axb4 14. Be2 b3 15. a4 *

En passant was never a legal move in that game.

https://support.chess.com/en/articles/8557558-what-is-en-passant-it-s-not-an-illegal-pawn-move