Reasoning eval · Puzzle CHmXJ
2 of 3 models found the move, and said 8 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.
- Rating
- 2422(2400 band)
- Solution
- c4b5 b7c7 a4a5 b6a5 b5a5 c7c6 a5a6
- Motifs
- crushingdefensiveMoveendgamepawnEndgameveryLongzugzwang
- FEN
- 8/1k6/1p2p1p1/4Pp1p/P1K2P1P/6P1/8/8 w - - 6 51
Stated plan
Advance a4-a5 to force a favorable pawn trade and infiltrate with the king.
Resolves to a4a5 · −663cp
Reasoning
The position is a king and pawn endgame. Playing a4-a5 forces bxa5 (else axb6+ wins a pawn immediately), after which the white king can march Kc5-b5 attacking the isolated a5 pawn, which the black king cannot defend in time from b7. This wins a pawn and creates a decisive passed pawn advantage.
Claims extracted from it
0 true · 5 false · 0 unverifiable
Hover a claim to light up the squares it is about.
- False
Playing a4-a5 forces bxa5
lineprefix=playedmoves=a5assertion=type:forced_reply
- False
If Black does not play bxa5, then axb6+ wins a pawn immediately
lineprefix=playedmoves=a5 axb6+assertion=type:captures_piece piece:pawn
- False
After a5 bxa5, the white king can march Kc5-b5 attacking the isolated a5 pawn
lineprefix=playedmoves=a5 bxa5 Kc5 Kb5assertion=type:attacked square:a5 by:white
- False
The black king cannot defend the a5 pawn in time from b7
lineprefix=playedmoves=a5 bxa5 Kc5 Kb5assertion=type:defended square:a5 by:black negated:true
- False
This wins a pawn and creates a decisive passed pawn advantage
lineprefix=playedmoves=a5 bxa5 Kc5 Kb5assertion=type:material_delta side:white min_value:1