Reasoning eval · Puzzle wR7QA

1 of 3 models found the move, and said 4 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.

1
2
3
4
5
6
7
h8
g
f
e
d
c
b
a
SolutionPlayedBlack to move
Rating
2064(2000 band)
Solution
d4c3 d3c3 e5e4
Motifs
crushingdefensiveMoveendgamepawnEndgameshort
FEN
8/6p1/p5p1/Pp2k1P1/1P1p3P/2PK4/8/8 b - - 0 45
MissedPlayed e5f4(−1287cp)Claims true 50%4564 out · $0.0463 · 57.1s

Stated plan

March the king toward f4–g4/g3 to win the undefended h4 and then g5 pawns, creating a decisive kingside passed pawn.

Reasoning

Black's queenside pawns are all frozen (a6/a5, b5/b4, d4 blocked by c3), so the only progress comes from the king. The kingside is where Black can actually win material: h4 is undefended and g5 is only defended by h4, so marching the king via f4–g4/g3 lets Black capture h4 first, then g5, netting two pawns and creating an easy passed g-pawn (Black already has doubled g-pawns). Meanwhile White's king is too far from the kingside to intervene in time, and any White queenside break (Kc4xb5) is slower than Black's kingside harvest since Black's king starts much closer to h4/g5 than White's does to b5. Hence the winning plan begins with heading the king toward g4/g3.

Claims extracted from it

2 true · 2 false · 4 unverifiable

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

  • Unverifiable

    Black's queenside pawns are all frozen

    unverifiable

  • True

    h4 is undefended

    defendedsquare=h4negated=true

  • True

    g5 is only defended by h4

    defendedsquare=g5by=h4

  • False

    marching the king via f4–g4/g3 lets Black capture h4 first, then g5

    linemoves=Kf4 Kg4/Kg3 Kxh4 Kxg5assertion=type:captures_piece piece:pawn

  • False

    Black nets two pawns and creates an easy passed g-pawn

    linemoves=Kf4 Kg4/Kg3 Kxh4 Kxg5assertion=type:material_delta side:black min_value:2

  • Unverifiable

    White's king is too far from the kingside to intervene in time

    unverifiable

  • Unverifiable

    any White queenside break (Kc4xb5) is slower than Black's kingside harvest

    unverifiable

  • Unverifiable

    Black's king starts much closer to h4/g5 than White's does to b5

    unverifiable