Reasoning eval · Puzzle rCcM1
3 of 3 models found the move
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
- 1519(1600 band)
- Solution
- g2g1q
- Motifs
- advancedPawnendgamematemateIn1oneMovepromotion
- FEN
- 3QQ3/1pr3pk/p6p/P7/1P1q4/7P/6pK/R4N2 b - - 0 37
Stated plan
Promote the g2 pawn to queen with check, delivering an unstoppable mate since the new queen is protected by the queen on d4.
Reasoning
Black's pawn on g2 can promote with check. After g2g1=Q+, the new queen attacks the king on h2 diagonally, and this queen is protected by the black queen on d4 (which covers g1 via the d4-e3-f2-g1 diagonal), so the king cannot capture it. The king also has no escape: g3 and h1 are covered by the new queen, and h3 is occupied by White's own pawn. No white piece can block or capture the checking queen. This is checkmate.
Claims extracted from it
5 true · 0 false · 1 unverifiable
Hover a claim to light up the squares it is about.
- True
Black's pawn on g2 can promote with check
linemoves=g1=Q+assertion=type:gives_check
- Unverifiable
After g1=Q+, the new queen is protected by the black queen on d4
linemoves=g1=Q+assertion=type:defended square:g1 by:black
- True
After g1=Q+, g3 is covered by the new queen
linemoves=g1=Q+assertion=type:king_cannot_go square:g3 side:white
- True
After g1=Q+, h1 is covered by the new queen
linemoves=g1=Q+assertion=type:king_cannot_go square:h1 side:white
- True
After g1=Q+, h3 is occupied by White's own pawn
piece_on_squaresquare=h3piece=pawnby=white
- True
After g1=Q+, this is checkmate
linemoves=g1=Q+assertion=type:is_mate