Reasoning eval · Puzzle b9Dbz

0 of 3 models found the move, and said 5 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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SolutionPlayedBlack to move
Rating
2315(2400 band)
Solution
e2e7 a5c7 d6c7 a7c7 e7c7
Motifs
advantagelongmiddlegame
FEN
1r5k/Q5pp/3q4/B1pB4/2Pp1P2/P5P1/4r2P/5RK1 b - - 1 26
MissedPlayed b8c8(−867cp)Claims true 80%8601 out · $0.0867 · 106.1s

Stated plan

Retreat the rook from b8 to a safe square, avoiding the queen's attack on the a7-b8 diagonal.

Reasoning

Black's rook on b8 is attacked by the queen on a7 along the a7-b8 diagonal, with no defender available. Tactical tries like Qxd5 (cxd5 wins the queen), Rxh2 (allows Qxb8+ winning material), or Qb6 (Bxb6) all fail. The safest and soundest solution is simply to move the rook off the dangerous diagonal to a safe square, avoiding material loss while keeping the position solid.

Claims extracted from it

4 true · 1 false · 1 unverifiable

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

  • True

    Black's rook on b8 is attacked by the queen on a7

    attackedsquare=b8by=white

  • False

    Black's rook on b8 has no defender available

    defendedsquare=b8by=blacknegated=true

  • True

    After Qxd5, cxd5 wins the queen

    lineprefix=playedmoves=Qxd5 cxd5assertion=type:captures_piece piece:queen

  • True

    After Rxh2, Qxb8+ wins material

    lineprefix=playedmoves=Rxh2 Qxb8+assertion=type:material_delta side:white min_value:1

  • True

    After Qb6, Bxb6 wins the queen

    lineprefix=playedmoves=Qb6 Bxb6assertion=type:captures_piece piece:queen

  • Unverifiable

    Moving the rook off the dangerous diagonal to a safe square is the safest and soundest solution

    unverifiable