Seed 1010: Black wins in 37 moves
74 手
Misty 1.6 plays itself at thirty seconds a move. Each side sees only its own pieces and the squares they can move to. There is no check and no checkmate: the game ends when a king is taken.
A strange move, and a weak one. Black can see everything White has done, so the fog is no excuse. Stockfish answers 3.Bb5+, landing on the square 2...a6 would have covered; 2...c6 and 2...Qxd5 are also better. Run again on the same position, Misty's search chose Qxd5, so a5 was n…
Risky for the reason that plays out: the bishop steps away and uncovers the rook on e8 against White's queen. But White had seen neither ...O-O nor ...Re8. It put a rook on e8 in about one position in 250 and Black's king there in three out of four, and across what it thought pos…
This drops a knight, and White is four pawns up. The search wanted 12...Qd6. A safety check swapped in Nd5 because it lost material in 9 of the 78 positions Black thought possible and Qd6 in 10. The 9 were the ones with a white knight on c3, and the knight was there.
The queen becomes the target of Black's next two moves. White was not guessing here, though: only one position fit what it had seen. Stockfish rates Qc5 a fraction of a pawn behind 14.Qxb5, and 14.Qd3, guarding the knight from a defended square, is sound but no better. White is s…
15.Nf4 is equal. In hindsight, c3 is where the b-pawn can hit the knight, and 16...b4 does.
White sensed the danger, but credit goes to a safety check, not the search, which wanted 16.Rad1. The check vetoed any move that lost material to one capture in 2 or more of White's 12 possible positions. It flagged 51 of 52 moves, so there really was no safe square, and Qa3 was…
It removes the bishop that guarded c5, and 18...Nc5 follows. As a plan it is too generous to Misty: the search rated Rxe3 and bxc3 equal and played the rook move a little over half the time, and by Stockfish it cost two pawns against taking the knight. It pays off only because of…
Why not take the free knight? Because White will move it. White can see the b4 pawn attacking its knight, but not c5, which no white piece reaches. With full sight Stockfish prefers 18...bxc3, because White would answer Nc5 with 19.Qc4. Under fog, any knight move leaves Black mor…
White does the sensible thing with what it knows. One of its 158 possible positions had a knight on c5, and all five of its top choices were knight moves.
White should take the knight. It knew the whole board, and 20.axb3 or 20.cxb3 is about a pawn better. Misty scores the end of each searched line with a one-move Stockfish look, and at that depth Rad1, hitting the queen on d8, looks better. A deeper look shows Black simply moving…
Bad luck. White put Black's queen on d5, covering c4, in one of its 26 possible positions, and across all 26 Nc4 was its best move.