Chess Puzzle #RSW5U — Advanced, Black to move, middlegame

Position

White: king g1; queen f1; rooks c1/e1; pawns a3/c6/e3/f2/g3. Black: king g8; queen f3; rooks g5/g7; pawns b5/d5/e4/f6/h7. Material is balanced. Black to move.

Solution (4 moves)

1. Opponent setup: c7 — pawn c6→c7. Now Black to move.
2. Best move: Rxg3+ — rook g5→g3, captures pawn, gives check. Opponent replies fxg3 (pawn f2→g3, captures rook).
3. Best move: Qxg3+ — queen f3→g3, captures pawn, gives check. Opponent replies Kh1 (king g1→h1).
4. Best move: Qh4+ — queen g3→h4, gives check. Opponent replies Qh3 (queen f1→h3).
5. Best move: Qxh3# — queen h4→h3, captures queen, delivers checkmate.

Tactical themes

endgame, mate, mate in 4, sacrifice, very long. The combination ends with Qxh3# delivering checkmate.

Position data

FEN: 6k1/6rp/2P2p2/1p1p2r1/4p3/P3PqP1/5P2/2R1RQK1 w - - 1 37

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