Chess Puzzle #jjINo — Expert, White to move, middlegame

Position

White: king f3; queen h2; rook h1; bishop d2; knight e4; pawns a2/b2/c4/d5/g6. Black: king e5; queen d8; rooks a8/f8; bishops b7/d4; knight f5; pawns a7/b6/c7/d6/f4. Black is ahead by 8 points of material. White to move.

Solution (4 moves)

1. Opponent setup: Ng3 — knight f5→g3. Now White to move.
2. Best move: Qh5+ — queen h2→h5, gives check. Opponent replies Nxh5 (knight g3→h5, captures queen).
3. Best move: Rxh5+ — rook h1→h5, captures knight, gives check. Opponent replies Qg5 (queen d8→g5).
4. Best move: Rxg5+ — rook h5→g5, captures queen, gives check. Opponent replies Rf5 (rook f8→f5).
5. Best move: Bxf4# — bishop d2→f4, captures pawn, delivers checkmate.

Tactical themes

mate, mate in 4, middlegame, sacrifice, very long. The combination ends with Bxf4# delivering checkmate.

Position data

FEN: r2q1r2/pbp5/1p1p2P1/3Pkn2/2PbNp2/5K2/PP1B3Q/7R b - - 10 28

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