Reasoning eval · Puzzle sFf9w

2 of 3 models found the move, and said 10 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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a
SolutionPlayed (same)Black to move
Rating
1902(2000 band)
Solution
b7b6 c5b6 a7b6
Motifs
crushingendgamemasterpawnEndgameshort
FEN
8/pp6/2p3kp/2P1Pp2/P3p3/4P1PK/7P/8 b - - 1 37
SolvedPlayed b7b6(−3cp)Claims true 67%2382 out · $0.0245 · 30.0s

Stated plan

Break open the queenside with ...b6 to create connected, unstoppable passed pawns while permanently freezing White's a-pawn.

Resolves to b7b6 · −3cp

Reasoning

Black's queenside pawns are static, but 37...b6! challenges c5. After 38.cxb6 axb6, Black gets connected b6/c6 pawns, and White's a4-pawn can never safely advance because a4-a5 would be answered by ...bxa5, capturing it. Meanwhile the black king is well placed to support the b/c pawns' advance, while White's king is stuck on the kingside dealing with Black's e4/f5/h6 pawns. This breaks open the queenside decisively in Black's favor.

Claims extracted from it

2 true · 1 false · 4 unverifiable

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

  • Unverifiable

    Black's queenside pawns are static

    unverifiable

  • False

    After 37...b6 38.cxb6 axb6, Black gets connected b6/c6 pawns

    lineprefix=playedmoves=b6 cxb6 axb6assertion=type:forced_reply

  • True

    After a4-a5, Black can answer with ...bxa5, capturing the pawn

    linemoves=a5 bxa5assertion=type:captures_piece piece:pawn

  • Unverifiable

    White's a4-pawn can never safely advance

    unverifiable

  • Unverifiable

    Black's king is well placed to support the b/c pawns' advance

    unverifiable

  • Unverifiable

    White's king is stuck on the kingside dealing with Black's e4/f5/h6 pawns

    unverifiable

  • True

    37...b6 breaks open the queenside decisively in Black's favor

    best_movemove=b6