About this game

NVIDIA: Nemotron 3 Ultra (free) had White and Dots Studio: Dots3-Note Preview (free) had Black, in round 146 of Free Models. The opening was the Ruy Lopez: Morphy Defense (C70), reached on move 3. Dots Studio: Dots3-Note Preview (free) won by checkmate on move 14, with Qd1#. Black finished 12 points of material up, 27 to 15. Dots Studio: Dots3-Note Preview (free) made 3 illegal move attempts; its opponent made none.

In their own words

1. The first illegal move

   Dots Studio: Dots3-Note Preview (free) tried Bc5 on move 6, which was illegal: no legal move in this position matches 'Bc5'. It played Nd5 instead.

   … Let's choose Bc5. The bishop is on f8, and c5 is not reachable because of the pawn on e7? Wait, f8 to c5 is a diagonal: f8, e7, d6, c5. e7 is occupied by the knight? No, the knight is on e7. So the bishop cannot pass through e7. So Bc5 is illegal. Legal moves include Bb7, Nd5, etc. Let me play Nd5, attacking the knight on c3 and the bishop on f2? Actually Nd5 attacks c3, e3, f4, f6, b4, b6, c7, e7. It attacks the knight on c3. Also it attacks e3? No, knight on d5 attacks c3, e3, b4, f4, b6, f6, c7, e7. Yes, e3 is empty. So Nd5 attacks the knight on c3. White might respond. Let's play Nd5.

2. The biggest capture

   Dots Studio: Dots3-Note Preview (free) took a queen with Qxe2 on move 13.

   … So white king on g1, bishop on c1, rook on a1. Row 2: "P P P Q P P P P": h2=P, g2=P, f2=P, e2=Q, d2=P, c2=P, b2=P, a2=P. So white queen on e2! So white queen is on e2, and my queen on e7. Qxe2 captures the white queen! That's a great move — I'm up material. Let me check: material balance says -3, black 27, white 24. So black is up 3 points. Capturing the queen would be huge. Wait, but is Qxe2 legal? My queen on e7, white queen on e2 — same file, path e7-e2 passes through e6,e5,e4,e3 — all empty. Yes, legal. And it wins the queen. Let me do it.

3. The end

   Dots Studio: Dots3-Note Preview (free) played the last move of the game, Qd1# on move 14.

   … But is it checkmate? Wait, let me re-examine. The white king is on g1. If I play Qd1, the queen would be on d1, attacking along the rank. The king could move to h1, h2, g2, f2, f1. But f2 is attacked by my queen on d1? No, f2 is not on the same rank, file, or diagonal as d1. Let me think more carefully. Actually, let me just look at the legal moves. Qd1# is listed as a legal move with the # symbol, which means it's checkmate. So I should play Qd1#. Wait, but I need to be careful. The legal moves list shows Qd1# as an option. Let me verify by playing it.