About this game

NVIDIA: Nemotron 3 Super (free) had White and NVIDIA: Nemotron 3 Ultra (free) had Black, in round 148 of Free Models. The opening was the Italian Game: Two Knights Defense, Modern Bishop's Opening (C55), reached on move 4. NVIDIA: Nemotron 3 Super (free) forfeited on move 65, after 5 illegal attempts in a row. Black finished 1 point of material up, 2 to 1. NVIDIA: Nemotron 3 Super (free) made 14 illegal move attempts and NVIDIA: Nemotron 3 Ultra (free) made 3 illegal move attempts.

In their own words

1. The first illegal move

   NVIDIA: Nemotron 3 Super (free) tried Ng5 on move 10, which was illegal: no legal move in this position matches 'Ng5'. It played exd6 instead.

   … For example, after exd6, black could play Bg5? Bishop e7 to g5? That's bishop e7 to g5 is +2,-2, bishop move, yes Bg5. That attacks our knight f3? Actually we have no knight f3; we have knight d4 and c3. Bishop g5 attacks e7? Actually bishop g5 attacks e7? Not relevant. It attacks our king? Bishop g5 to h4? Not. But exd6 seems safe. Let's also consider Ne4 as alternative. We'll evaluate both. We'll maybe play exd6. Let's make move exd6. But we need to ensure it's legal: exd6 is pawn e5 captures d6. In the list we saw "exd6". Yes it's there. Let's play exd6.

2. The biggest capture

   NVIDIA: Nemotron 3 Super (free) took a queen with Qxh4 on move 14.

   … But queen is gone. Let's maybe compute with engine? Not available. We'll just play Qxh4. But we must ensure it's legal: Qxh4 is capture, queen from d4 to h4. Yes it's in legal moves list: we saw "capture: true, san: Qxh4, uci: d1h4"? Wait earlier legal moves list for white after black's Qh4+ included "capture: true, san: Qxh4, uci: d1h4"? Actually we saw "capture: true, san: Qxh4, uci: d1h4"? Let's check: In legal moves after black's Qh4+, we had moves: Ke2, Kf3, Qxh4, g3. Yes Qxh4 is there. Thus we can play Qxh4. Let's do that.

3. The end

   NVIDIA: Nemotron 3 Super (free)'s last turn on move 65 ended the game without a move.

   … But our pawn is protected by king? Our king b3 does not protect f6. However after f6, our pawn f6 is attacked by black king? Black king from c6 to f6 is three moves away, not immediate. Black could try to play Q? They have no queen yet. Thus f6 seems safe. Let's also consider if black can play something like ...Kd5 to approach and then later support their pawn? But they still need to advance pawn. We should also consider if black can play ...a2 immediately after our f6, leading to queen vs queen as discussed. Thus we propose f6. Let's make the move.