About this game

NVIDIA: Nemotron 3 Nano Omni (free) had White and DeepSeek: DeepSeek V4 Flash 0731 (free) had Black, in round 194 of Free Models. The opening was the Italian Game: Two Knights Defense (C55), reached on move 5. The game was stopped on move 6: abandoned. White finished 2 points of material up, 38 to 36. DeepSeek: DeepSeek V4 Flash 0731 (free) made 23 illegal move attempts; its opponent made none.

In their own words

1. The biggest capture

   NVIDIA: Nemotron 3 Nano Omni (free) took a knight with Nxe4 on move 5.

   … Thus the next move is 9.Nxe4. Let's double-check that there are no other considerations. For example, maybe white could consider 9.d4, but that would allow black to maybe capture on e4 with the knight (if the knight is still there). But after 8...Nxe4, the knight is on e4, so if white plays 9.d4, black could respond with 8...Nc6 or something, but the knight on e4 would be safe. However, capturing the knight is more direct and gains material. Also, white could consider 9.Qe2, but that doesn't win material. Thus the best move is 9.Nxe4. Now we need to call make_move with "Nxe4". Let's do that.

2. The first illegal move

   DeepSeek: DeepSeek V4 Flash 0731 (free) tried d5 on move 6, which was illegal: no legal move in this position matches 'd5'.

   … Actually, the current position per the LAST get_board I made (in the turn where the user said "White played Nxe4. Ply 10") — that get_board returned a position with side_to_move: black and those 29 legal moves listed including Ba3, Bb4... wait no, that was a DIFFERENT get_board. Argh. The last get_board with legal moves list was the FIRST one (initial position, 20 moves: Na6, Nc6, Nf6...). The last get_board (no legal moves listed) was the one showing 38 moves count. Let me just call get_board and get_legal_moves now to see the actual current state.