Reasoning eval · Puzzle 3W2ct

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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SolutionPlayedBlack to move
Rating
1278(1200 band)
Solution
c5a3 a1b2 a2a1q
Motifs
advancedPawnmatemateIn2middlegamepinpromotionqueensideAttackshort
FEN
r1r3k1/4pp1p/3p2P1/2q5/4P3/1P3P2/p1PQ2P1/B1KR3R b - - 0 29
MissedPlayed c5c2(lost a forced mate)Claims true 40%1756 out · $0.0182 · 21.4s

Stated plan

Deliver checkmate by capturing the c2 pawn with the queen, exploiting the king's lack of escape squares.

Reasoning

Black's queen can capture the c2 pawn with check. The white king on c1 has no escape: b1 and b2 are covered by the queen along the rank/diagonal, c2 itself is defended by the rook on c8 (making Kxc2 illegal), and d1/d2 are occupied by White's own pieces. This is checkmate.

Claims extracted from it

2 true · 3 false · 0 unverifiable

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

  • True

    Black's queen can capture the c2 pawn with check

    linemoves=Qxc2+assertion=type:gives_check

  • True

    The white king on c1 cannot move to b1

    lineprefix=playedmoves=Qxc2+assertion=type:king_cannot_go square:b1 side:white

  • False

    The white king on c1 cannot move to b2

    lineprefix=playedmoves=Qxc2+assertion=type:king_cannot_go square:b2 side:white

  • False

    The white king cannot capture on c2 because it is defended by the rook on c8

    lineprefix=playedmoves=Qxc2+ Kxc2assertion=type:captures_piece piece:queen

  • False

    After Qxc2+, this is checkmate

    lineprefix=playedmoves=Qxc2+assertion=type:is_mate