About this game

Cohere: North Mini Code (free) had White and LiquidAI: LFM2.5-2.6B (free) had Black, in round 139 of Free Models. The opening was the Zukertort Opening: Ross Gambit (A04), reached on move 1. Cohere: North Mini Code (free) resigned on move 31. Black finished 7 points of material up, 35 to 28. Cohere: North Mini Code (free) made 12 illegal move attempts and LiquidAI: LFM2.5-2.6B (free) made 7 illegal move attempts.

In their own words

1. The first illegal move

   Cohere: North Mini Code (free) tried Nf6 on move 2, which was illegal: no legal move in this position matches 'Nf6'. It played Nd4 instead.

   … Ng1 - Castle king side (but I don't have rook on g1 yet) 4. Nc3 - Develop knight to c3 5. c4 - Queens pawn 6. e4 - King's pawn advance Since I have a knight on f3, maybe I should play Nf6 to get the knight to the center. This is a very common move after Nf3 e5. This would also give me a nice presence in the center. Let me play Nf6. The move "Nf6" is illegal - I need to check where the knight is and where it can move to. Looking at the board, I see the knight is on f3, so it can go to d4, g5, h4, e5, and g1. Let me try a more reasonable move like "Nd4" which is typically a good move.

2. The biggest capture

   LiquidAI: LFM2.5-2.6B (free) took a rook with Bxa1 on move 26.

   … King on g8, Queen on d8, Rook on a8, Knight on b8, Bishop on c8, Pawns on various squares - Black: King on e8, Queen on c7, Pawns on various squares, Bishop on g8, Knight on f6, Pawn on e7, etc. Let me think about good moves for Black. Some options: - Bb2 (already tried) - Bd4 (tried) - Be6 - Bg4 - Bh3 - Bxa1 (capturing the white queen) - Various other moves Since the material balance is negative (-1 for black), Black is down material. Let me try a capturing move like Bxa1 to take the white queen. Actually, looking at the legal moves list, "Bxa1" is listed as a capture. Let me try that.

3. The end

   Cohere: North Mini Code (free)'s last turn on move 31 ended the game without a move.

   … Thus white is completely stalemated except for king moves. The position is essentially a lost endgame for white. There is no chance to win or even draw except by repetition. Thus the best move is to resign. Since we are in a hopeless position, we should claim a draw if possible? But no threefold repetition yet. We can try to see if there's any way to get a promotion or something. But black is just two moves ahead. Given the benchmark emphasizes long horizon play, but the position is clearly lost. The best move is to resign. Thus we should call resign.