Reasoning eval · Puzzle 9LK4T

1 of 3 models found the move, and said 16 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
1960(2000 band)
Solution
g5g2 c2d1 c4b2
Motifs
crushingdeflectionmiddlegameshort
FEN
Q4b1r/4kppp/p7/2p1p1q1/2np4/1P1P1P1P/PBK3P1/RN2R3 b - - 1 19
MissedPlayed c4e3(−1282cp)Claims true 33%4048 out · $0.0412 · 48.0s

Stated plan

Play Ne3+ to fork the king and rook, winning material regardless of White's reply.

Resolves to c4e3 · −1282cp

Reasoning

The White king on c2 is very cramped, with its own bishop, pawn and knight blocking most escape squares. Playing Nc4-e3+ delivers check (knight attacks c2 and d1). The king's only legal escape is Kc1, but then the knight simply takes the undefended rook on e1 (Nxe1), winning a rook for the knight. To avoid losing the rook for free, White's best practical try is Rxe3, capturing the knight - but that still nets Black the exchange (rook for knight). Either way Black wins material.

Claims extracted from it

2 true · 4 false · 1 unverifiable

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

  • Unverifiable

    The White king on c2 is very cramped

    unverifiable

  • True

    Ne3+ delivers check

    lineprefix=playedmoves=Ne3+assertion=type:gives_check

  • False

    The king's only legal escape is Kc1

    lineprefix=playedmoves=Ne3+assertion=type:forced_reply pattern:king

  • True

    After Ne3+ Kc1, the rook on e1 is undefended

    defendedsquare=e1negated=true

  • False

    After Ne3+ Kc1, Nxe1 wins a rook for the knight

    lineprefix=playedmoves=Ne3+ Kc1 Nxe1assertion=type:captures_piece piece:rook

  • False

    After Ne3+, Rxe3 is White's best practical try

    best_movemove=Rxe3

  • False

    After Ne3+ Rxe3, Black wins the exchange

    lineprefix=playedmoves=Ne3+ Rxe3assertion=type:material_delta side:black min_value:2