Reasoning eval · Puzzle BpBjT

1 of 3 models found the move, and said 6 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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SolutionPlayedWhite to move
Rating
1166(1200 band)
Solution
b3f7
Motifs
matemateIn1oneMoveopening
FEN
r2qkb1r/ppp3pp/2np1n2/4pbN1/3PpB2/1QP5/PP3PPP/RN2KB1R w KQkq - 0 8
MissedPlayed b3b7(lost a forced mate)Claims true 50%657 out · $0.0073 · 9.3s

Stated plan

Play Qxb7 to fork the a8-rook and c6-knight, winning material.

Resolves to b3b7 · lost a forced mate

Reasoning

Qxb7 wins a pawn while forking the rook on a8 and the knight on c6; neither defended piece can be saved simultaneously, e.g. after Rb8, Qxc6+ wins material with check.

Claims extracted from it

2 true · 2 false · 1 unverifiable

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

  • True

    Qxb7 wins a pawn

    lineprefix=playedmoves=Qxb7assertion=type:captures_piece piece:pawn

  • Unverifiable

    Qxb7 forks the rook on a8 and the knight on c6

    unverifiable

  • False

    The rook on a8 is not defended

    defendedsquare=a8by=blacknegated=true

  • False

    The knight on c6 is not defended

    defendedsquare=c6by=blacknegated=true

  • True

    After Qxb7 Rb8, Qxc6+ wins material with check

    lineprefix=playedmoves=Qxb7 Rb8 Qxc6+assertion=type:material_delta side:white min_value:1