Reasoning eval · Puzzle 5O7J6

2 of 3 models found the move, and said 13 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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a1
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SolutionPlayed (same)White to move
Rating
1182(1200 band)
Solution
d1d7 c7d7 b5d7
Motifs
crushingforkmiddlegameshort
FEN
1r3b1r/2qn1kp1/6p1/1Q4P1/2P1Pp2/7P/Pp3P2/1K1R3R w - - 0 24
SolvedPlayed d1d7(−0cp)Claims true 67%3572 out · $0.0364 · 46.1s

Stated plan

Play Rxd7 to win the knight, exploiting the pin-like alignment so that after Qxd7 White answers with Qxd7+, netting a queen for a rook.

Resolves to d1d7 · −0cp

Reasoning

The knight on d7 is only defended by the queen on c7. Playing Rxd7 wins the knight; if Black recaptures with Qxd7, White's queen on b5 lies on the same diagonal (b5-c6-d7) and can play Qxd7+, winning the queen as well, since nothing recaptures on d7 and the king is left in check. If Black instead moves the queen away to avoid this, White simply keeps the extra knight. Either way this is a decisive material gain.

Claims extracted from it

4 true · 2 false · 0 unverifiable

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

  • True

    The knight on d7 is only defended by the queen on c7

    defendedsquare=d7by=c7

  • True

    Playing Rxd7 wins the knight

    best_movemove=Rxd7

  • True

    If Rxd7 Qxd7, White's queen on b5 can play Qxd7+, winning the queen

    lineprefix=playedmoves=Rxd7 Qxd7 Qxd7+assertion=type:captures_piece piece:queen

  • True

    After Qxd7+ the king is left in check

    lineprefix=playedmoves=Rxd7 Qxd7 Qxd7+assertion=type:gives_check

  • False

    Nothing recaptures on d7 after Qxd7+

    lineprefix=playedmoves=Rxd7 Qxd7 Qxd7+assertion=type:forced_reply

  • False

    If Black moves the queen away to avoid this, White simply keeps the extra knight

    lineprefix=playedmoves=Rxd7assertion=type:material_delta side:white min_value:3