Reasoning eval · Puzzle H4SXF
2 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.
- Rating
- 1574(1600 band)
- Solution
- c5g1 h1g1 d8d1 e2e1 d1e1
- Motifs
- attractionkingsideAttacklongmatemateIn3middlegame
- FEN
- 3r2k1/5ppp/p7/1pq1pN2/4P1n1/2P5/PB2R1PP/6QK b - - 4 23
Stated plan
Sacrifice the queen to trade off white's queen, then deliver a back-rank mate using the rook, exploiting the knight on g4 which covers the king's only escape square.
Reasoning
Black's queen on c5 already attacks the white queen on g1 along the c5-g1 diagonal (d4-e3-f2 are all empty). Capturing starts a forced mating sequence: 1...Qxg1+ 2.Kxg1 Rd1+ 3.Re1 (forced block, since the king has no escape squares - f2 is covered by the knight on g4, g2/h2 are occupied by white's own pawns) Rxe1+ and now the king still has no legal escape (f1 and h1 are covered by the rook, f2 by the knight, g2/h2 blocked by own pawns), and no white piece can capture or block - this is checkmate.
Claims extracted from it
4 true · 2 false · 0 unverifiable
Hover a claim to light up the squares it is about.
- True
Black's queen on c5 attacks the white queen on g1 along the c5-g1 diagonal
attackedsquare=g1by=black
- True
After 1...Qxg1+ 2.Kxg1 Rd1+ 3.Re1 Rxe1+ this is checkmate
linemoves=Qxg1+ Kxg1 Rd1+ Re1 Rxe1+assertion=type:is_mate
- True
3.Re1 is forced because the king has no escape squares
linemoves=Qxg1+ Kxg1 Rd1+assertion=type:forced_reply
- True
f2 is covered by the knight on g4
controls_squaresquare=f2by=black
- False
f1 is covered by the rook on e1
controls_squaresquare=f1by=black
- False
h1 is covered by the rook on e1
controls_squaresquare=h1by=black