Reasoning eval · Puzzle qL1VF

2 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.

8
7
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a1
b
c
d
e
f
g
h
SolutionPlayed (same)White to move
Rating
2333(2400 band)
Solution
h6g6 e7g7 g6e8 d6f8 h1h8 g8h8 e8f8 d5g8 f1h1 g7h7 h1h7 h8h7 f8h6
Motifs
attractiondeflectionexposedKingkingsideAttackmatemateIn5middlegamepinveryLong
FEN
6k1/pb2r3/3b2pQ/1p1q2P1/3P1p2/1PP1pP2/P5K1/5R1R w - - 4 36
SolvedPlayed h6g6(−0cp)Claims true 67%2438 out · $0.0251 · 29.0s

Stated plan

Sacrifice-capture on g6 with check to force the king to f8, then deliver mate with Rh8+.

Reasoning

Qxg6+ opens the h-file for the rook on h1, so the black king cannot go to h8 (illegal) and must go to f8. Then Rh8+ is mate: the king cannot go to e8 (rook covers rank 8), cannot go to f7 (queen on g6 covers it), and e7 is occupied by black's own rook.

Claims extracted from it

4 true · 2 false · 0 unverifiable

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

  • True

    Qxg6+ opens the h-file for the rook on h1

    linemoves=Qxg6+assertion=type:gives_check

  • True

    After Qxg6+, the black king cannot go to h8

    lineprefix=playedmoves=Qxg6+assertion=type:king_cannot_go square:h8 side:black

  • False

    After Qxg6+, the black king must go to f8

    lineprefix=playedmoves=Qxg6+assertion=type:forced_reply

  • False

    After Qxg6+ Kf8, Rh8 is mate

    lineprefix=playedmoves=Qxg6+ Kf8 Rh8assertion=type:is_mate

  • True

    After Rh8+, the king cannot go to e8 because the rook covers rank 8

    lineprefix=playedmoves=Qxg6+ Kf8 Rh8+assertion=type:king_cannot_go square:e8 side:black

  • True

    After Rh8+, the king cannot go to f7 because the queen on g6 covers it

    lineprefix=playedmoves=Qxg6+ Kf8 Rh8+assertion=type:king_cannot_go square:f7 side:black