Black has captured my bishop with **Rxb7**. This recaptures the pawn, but I have plenty of material left. Let me check the position. My material advantage is still significant. Let me continue with a forcing move. I have the queen on c5, two rooks (a3 and e1), and pieces on a5, c4, e4, f2, g2, h2. Black has lost significant material. Let me play **Qxb7**, recapturing with the queen and maintaining a winning advantage.
I see from the FEN that the bishop on d5 moved elsewhere. Let me look at the current position. My queen is on c5, and my bishop is on c4. Black's rook is on b7. Let me play **Qxb7** to capture the rook.
I see that the rook on b7 is not directly accessible by my queen. Let me look at the legal moves. I have **Qa7** or **Qxc8** which capture pawns, or **Qxf8** which captures the rook on f8. Let me play **Qxf8**, capturing the rook on f8.
About this game
Poolside: Laguna XS 2.1 (free) had White and NVIDIA: Nemotron 3.5 Lightning (free) had Black, in round 351 of Free Models. The opening was the Four Knights Game: Italian Variation (C50), reached on move 4. Poolside: Laguna XS 2.1 (free) won by checkmate on move 26, with Qxf8#. White finished 15 points of material up, 28 to 13. Poolside: Laguna XS 2.1 (free) made 21 illegal move attempts and NVIDIA: Nemotron 3.5 Lightning (free) made 2 illegal move attempts.
In their own words
The first illegal move
NVIDIA: Nemotron 3.5 Lightning (free) tried Nb6 on move 3, which was illegal: no legal move in this position matches 'Nb6'. It played Nc6 instead.
After 1. e4 e5 2. Nf3 Nf6 3. Nc3, I'll play the developing move 3... Nb6, preparing to challenge White's center and supporting ...d5. Black plays 3... Nc6 after 1. e4 e5 2. Nf3 Nf6 3. Nc3. The knights are now developed on c6 and f6, controlling the center.
its reply — the whole turn is in the replay above The biggest capture
Poolside: Laguna XS 2.1 (free) took a queen with Rxa3 on move 12.
… **a5** - counters the queen's presence on a3 4. **Be6** - develops the bishop with tempo Actually, looking at the position, I have a strong knight on d4 that can capture on d5 or protect key squares. Let me think about the tactics. The queen on a3 is attacking my c4-b5 diagonal? No, she's on a3 which controls b4 and is threatening to capture on a4. Let me play **Qd4**, keeping my queen centralized and eyeing the d7 square. This also defends against potential tactics. I see I can capture on a3 with **Rxa3**. Let me do that to remove the attacking queen.
its reply, the end of it — the whole turn is in the replay above The end
Poolside: Laguna XS 2.1 (free) played the last move of the game, Qxf8# on move 26.
… Black has lost significant material. Let me play **Qxb7**, recapturing with the queen and maintaining a winning advantage. I see from the FEN that the bishop on d5 moved elsewhere. Let me look at the current position. My queen is on c5, and my bishop is on c4. Black's rook is on b7. Let me play **Qxb7** to capture the rook. I see that the rook on b7 is not directly accessible by my queen. Let me look at the legal moves. I have **Qa7** or **Qxc8** which capture pawns, or **Qxf8** which captures the rook on f8. Let me play **Qxf8**, capturing the rook on f8.
its reply, the end of it — the whole turn is in the replay above