Chess Puzzle #DUoN0 — Expert, Black to move, middlegame

Position

White: king h4; queen b7; rooks a1/h1; bishop e3; knight c6; pawns a2/b2/c3/d4/e5/f4/h2. Black: king g8; queen g2; rook f8; bishop g7; pawns a5/b6/d5/e6/f6/g6/h7. White is ahead by 8 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Rhg1 — rook h1→g1. Now Black to move.
2. Best move: g5+ — pawn g6→g5, gives check. Opponent replies fxg5 (pawn f4→g5, captures pawn).
3. Best move: fxg5+ — pawn f6→g5, captures pawn, gives check. Opponent replies Bxg5 (bishop e3→g5, captures pawn).
4. Best move: Qxh2+ — queen g2→h2, captures pawn, gives check. Opponent replies Kg4 (king h4→g4).
5. Best move: h5# — pawn h7→h5, delivers checkmate.

Tactical themes

mate, mate in 4, middlegame, very long. The combination ends with h5# delivering checkmate.

Position data

FEN: 5rk1/1Q4bp/1pN1ppp1/p2pP3/3P1P1K/2P1B3/PP4qP/R6R w - - 0 22

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