Chess Puzzle #OGgeu — Advanced, Black to move, middlegame

Position

White: king g1; queen e2; rooks a1/b3; knights c4/g3; pawns a4/b2/d5/f2/g2. Black: king d7; queen h7; rooks b8/h8; bishop a5; knight c5; pawns a6/b7/c7/f4. White is ahead by 1 point of material. Black to move.

Solution (3 moves)

1. Opponent setup: Nxa5 — knight c4→a5, captures bishop. Now Black to move.
2. Best move: Qh2+ — queen h7→h2, gives check. Opponent replies Kf1 (king g1→f1).
3. Best move: Qh1+ — queen h2→h1, gives check. Opponent replies Nxh1 (knight g3→h1, captures queen).
4. Best move: Rxh1# — rook h8→h1, captures knight, delivers checkmate.

Tactical themes

back rank mate, long, mate, mate in 3, middlegame, sacrifice. The combination ends with Rxh1# delivering checkmate.

Position data

FEN: 1r5r/1ppk3q/p7/b1nP4/P1N2p2/1R4N1/1P2QPP1/R5K1 w - - 2 31

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