Reasoning eval · Puzzle JbyDX

1 of 3 models found the move, and said 9 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
1149(1200 band)
Solution
f5g5 f4g5 g6e4
Motifs
advantagediscoveredAttackmiddlegameshort
FEN
3r2k1/pp1p2pp/2pBp1qP/2P2rP1/3PQP2/6K1/PP6/R6R b - - 2 32
MissedPlayed f5d5(−1043cp)Claims true 40%15247 out · $0.1532 · 185.5s

Stated plan

Reroute the rook to d5, simultaneously attacking the undefended d4 pawn and unmasking Qg6's attack on the undefended White queen on e4.

Reasoning

Black's rook on f5 currently blocks the g6-e4 diagonal, so playing Rf5-d5 accomplishes two things at once: it attacks the undefended pawn on d4 (safely, since d5 is protected by the e6 pawn against Qxd5), and it unblocks the diagonal so that Black's queen on g6 suddenly attacks the White queen on e4, which has no defender. White is forced into a purely defensive queen move, after which Black is comfortably better and often still wins the d4 pawn.

Claims extracted from it

2 true · 3 false · 3 unverifiable

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

  • Unverifiable

    Black's rook on f5 blocks the g6-e4 diagonal

    unverifiable

  • False

    Playing Rd5 attacks the undefended pawn on d4

    lineprefix=playedmoves=Rd5assertion=type:captures_piece piece:pawn

  • True

    d5 is protected by the e6 pawn against Qxd5

    defendedsquare=d5by=black

  • Unverifiable

    Playing Rd5 unblocks the diagonal so that Black's queen on g6 attacks the White queen on e4

    lineprefix=playedmoves=Rd5assertion=type:unverifiable

  • True

    The White queen on e4 has no defender

    defendedsquare=e4by=whitenegated=true

  • False

    After Rd5, White is forced into a purely defensive queen move

    lineprefix=playedmoves=Rd5assertion=type:forced_reply

  • Unverifiable

    After Rd5 and White's defensive queen move, Black is comfortably better

    lineprefix=playedmoves=Rd5assertion=type:unverifiable

  • False

    After Rd5 and White's defensive queen move, Black often still wins the d4 pawn

    lineprefix=playedmoves=Rd5assertion=type:captures_piece piece:pawn