Reasoning eval · Puzzle WJuBL

2 of 3 models found the move, and said 11 false things along the way

Green is the solution, red is what the model played when it differed. Each claim below was pulled out of the prose beside it and checked against this exact position.

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SolutionPlayed (same)Black to move
Rating
1912(2000 band)
Solution
c8g4 h3h4 f3d1 a1d1 g4d1
Motifs
advantagelongmiddlegame
FEN
r1b2rk1/p1p2p2/7b/2p5/3p2P1/1P1P1qNK/PBP4P/R2Q2NR b - - 4 22
SolvedPlayed c8g4(−0cp)Claims true 60%12818 out · $0.1289 · 149.9s

Stated plan

Play Bxg4+, winning a pawn with check and forcing the white king to the exposed h4 square, continuing a decisive mating attack.

Resolves to c8g4 · −0cp

Reasoning

The black bishop on c8 has an open diagonal to g4 through d7-e6-f5, currently occupied by a white pawn. Capturing it with Bxg4 delivers check to the king on h3 (adjacent diagonal), and crucially the bishop is defended by the queen on f3. This forces the king's hand: Kxg4 is illegal (queen defends g4), Kg2 is illegal (queen f3 covers g2), Kh2/Kg3 are blocked by White's own pawn/knight. The king is forced to Kh4, landing in a highly exposed square while Black wins a pawn and keeps a raging attack with queen, bishop pair, and rooks against a nearly mated king.

Claims extracted from it

3 true · 2 false · 3 unverifiable

Hover a claim to light up the squares it is about.

  • Unverifiable

    The black bishop on c8 has an open diagonal to g4 through d7-e6-f5

    unverifiable

  • True

    Bxg4 delivers check to the king on h3

    linemoves=Bxg4assertion=type:gives_check

  • Unverifiable

    The bishop on g4 is defended by the queen on f3

    lineprefix=playedmoves=Bxg4assertion=type:defended square:g4 by:black

  • False

    After Bxg4, Kxg4 is illegal because the queen defends g4

    lineprefix=playedmoves=Bxg4 Kxg4assertion=type:king_cannot_go square:g4 side:white

  • True

    After Bxg4, Kg2 is illegal because the queen f3 covers g2

    lineprefix=playedmoves=Bxg4assertion=type:king_cannot_go square:g2 side:white

  • True

    After Bxg4, the king is forced to Kh4

    lineprefix=playedmoves=Bxg4assertion=type:forced_reply pattern:king

  • False

    After Bxg4 and Kh4, Black wins a pawn

    lineprefix=playedmoves=Bxg4 Kh4assertion=type:material_delta side:black min_value:1

  • Unverifiable

    After Bxg4 and Kh4, Black keeps a raging attack with queen, bishop pair, and rooks against a nearly mated king

    lineprefix=playedmoves=Bxg4 Kh4assertion=type:unverifiable