Reasoning eval · Puzzle fKSnX

3 of 3 models found the move, and said 12 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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SolutionPlayed (same)Black to move
Rating
1161(1200 band)
Solution
g3g1 f1e2 g8e8
Motifs
advantageendgamerookEndgameshort
FEN
2k3r1/1pp5/p1p5/8/3P4/6r1/PPP2R2/4RK2 b - - 1 27
SolvedPlayed g3g1(−43cp)Claims true 80%11532 out · $0.1160 · 141.8s

Stated plan

Play Rg3-g1+ to force the White king into the exposed e2 square, starting a forcing sequence that wins material or initiative.

Reasoning

Black's rooks are doubled on the g-file against White's king on f1. Playing Rg3-g1+ is check and cannot be answered by Kxg1 because the rook is defended by the other rook on g8. White's king is forced to e2 (f2 is blocked by White's own rook, g2 is covered by the g8-rook). This drags the king into the open center where it becomes vulnerable to further checks (e.g. ...Re8+), forcing further concessions and giving Black a powerful initiative/material chances, since White must always find the only safe square to avoid losing material outright.

Claims extracted from it

4 true · 1 false · 4 unverifiable

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

  • Unverifiable

    Black's rooks are doubled on the g-file against White's king on f1

    unverifiable

  • True

    Playing Rg1+ is check

    linemoves=Rg1+assertion=type:gives_check

  • False

    Rg1+ cannot be answered by Kxg1 because the rook is defended by the other rook on g8

    linemoves=Rg1+ Kxg1assertion=type:captures_piece piece:king

  • True

    White's king is forced to e2

    linemoves=Rg1+assertion=type:forced_reply pattern:king

  • Unverifiable

    f2 is blocked by White's own rook

    unverifiable

  • True

    g2 is covered by the g8-rook

    controls_squaresquare=g2by=black

  • True

    After Rg1+ Ke2, Re8+ gives further check

    lineprefix=playedmoves=Rg1+ Ke2 Re8+assertion=type:gives_check

  • Unverifiable

    Rg1+ drags the king into the open center where it becomes vulnerable to further checks

    linemoves=Rg1+assertion=type:unverifiable

  • Unverifiable

    Black has a powerful initiative and material chances

    unverifiable