Reasoning eval · Puzzle yGhPV

2 of 3 models found the move, and said 8 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
2371(2400 band)
Solution
c4d3 g2g4 d3c4 g4g5 a4a3 b2a3 c4c3 a3a4 b3b2
Motifs
advancedPawncrushingendgameexposedKinghangingPieceveryLong
FEN
8/8/8/8/p1k5/1p1R1P2/1K4P1/8 b - - 1 49
SolvedPlayed c4d3(−0cp)Claims true 100%2245 out · $0.0231 · 27.3s

Stated plan

Capture the undefended rook with the king.

Reasoning

The white rook on d3 is completely undefended - no white pawn or king guards it (Kb2 is not adjacent to d3, and pawns f3/g2 don't cover it). The black king on c4 is adjacent to d3 and capturing there does not place it adjacent to the white king. So Black simply wins the rook for free.

Claims extracted from it

4 true · 0 false · 0 unverifiable

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

  • True

    The white rook on d3 is completely undefended

    defendedsquare=d3by=whitenegated=true

  • True

    The black king on c4 is adjacent to d3

    controls_squaresquare=d3by=black

  • True

    Capturing on d3 does not place the black king adjacent to the white king

    linemoves=Kxd3assertion=type:king_cannot_go square:b2 side:white

  • True

    Black simply wins the rook

    linemoves=Kxd3assertion=type:captures_piece piece:rook