Chess Puzzle #JUjgq — Master, White to move, middlegame

Position

White: king b1; queen e3; rooks d1/g1; bishop c3; knights b5/f5; pawns a2/b2/b3/e4/h2. Black: king g8; queen d8; rooks a8/f8; bishop f4; knights c5/d3; pawns a7/c4/d5/f7/g7/h7. Black is ahead by 1 point of material. White to move.

Solution (4 moves)

1. Opponent setup: Bxe3 — bishop f4→e3, captures queen. Now White to move.
2. Best move: Rxg7+ — rook g1→g7, captures pawn, gives check. Opponent replies Kh8 (king g8→h8).
3. Best move: Rg8+ — rook g7→g8, gives check. Opponent replies Kxg8 (king h8→g8, captures rook).
4. Best move: Rg1+ — rook d1→g1, gives check. Opponent replies Bxg1 (bishop e3→g1, captures rook).
5. Best move: Nh6# — knight f5→h6, delivers checkmate.

Tactical themes

attraction, discovered check, double check, kingside attack, mate, mate in 4, middlegame, sacrifice, very long. The combination ends with Nh6# delivering checkmate.

Position data

FEN: r2q1rk1/p4ppp/8/1Nnp1N2/2p1Pb2/1PBnQ3/PP5P/1K1R2R1 b - - 1 21

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