Reasoning eval · Puzzle 8CtXx

1 of 3 models found the move, and said 7 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
2337(2400 band)
Solution
b5b4 c5b6 f5f4 b6a5 f4g5 a5b4 h7h5 a2a4 h5h4
Motifs
crushingdefensiveMoveendgamepawnEndgamequietMoveveryLong
FEN
8/7p/8/ppK2kP1/5P2/1P6/P7/8 b - - 3 54
MissedPlayed f5f4(−605cp)Claims true 50%6523 out · $0.0659 · 83.5s

Stated plan

Capture the undefended f4 pawn to gain material and tempo before dealing with the queenside.

Reasoning

Black's queenside pawns (a5,b5) are essentially doomed since White's king is already adjacent to b5, and pushing them only costs tempo without saving material. The most useful move is to grab the undefended f4 pawn, gaining material and tempo while the king heads back toward the kingside pawns, since g5 will then also become capturable next.

Claims extracted from it

1 true · 1 false · 2 unverifiable

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

  • Unverifiable

    Black's queenside pawns (a5, b5) are essentially doomed

    unverifiable

  • True

    The f4 pawn is undefended

    defendedsquare=f4by=whitenegated=true

  • False

    Grabbing the f4 pawn gains material and tempo

    lineprefix=playedmoves=Kxf4assertion=type:material_delta side:black min_value:1

  • Unverifiable

    After the king grabs f4, g5 will then also become capturable next

    lineprefix=playedmoves=Kxf4assertion=type:unverifiable