Chess Puzzle #6Xm9K — Advanced, Black to move, middlegame

Position

White: king h1; queen g8; rook c7; knight f3; pawns a3/e3/e5/f2/g4/h2. Black: king h3; queen b1; rook a4; bishop d3; pawns d5/g5/h6. White is ahead by 3 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Ng1+ — knight f3→g1, gives check. Now Black to move.
2. Best move: Qxg1+ — queen b1→g1, captures knight, gives check. Opponent replies Kxg1 (king h1→g1, captures queen).
3. Best move: Rxg4+ — rook a4→g4, captures pawn, gives check. Opponent replies Kh1 (king g1→h1).
4. Best move: Be4+ — bishop d3→e4, gives check. Opponent replies f3 (pawn f2→f3).
5. Best move: Bxf3# — bishop e4→f3, captures pawn, delivers checkmate.

Tactical themes

attraction, endgame, mate, mate in 4, sacrifice, very long. The combination ends with Bxf3# delivering checkmate.

Position data

FEN: 6Q1/2R5/7p/3pP1p1/r5P1/P2bPN1k/5P1P/1q5K w - - 2 35

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