Chess Puzzle #C8dyP — Advanced, Black to move, middlegame

Position

White: king g1; queen d4; rooks d1/f7; bishop b3; knight c3; pawns a2/b2/c2/e3/g2/h2. Black: king c8; queen c7; rooks e8/h8; knights d7/g4; pawns a7/b7/c6/e4/g6/h7. Material is balanced. Black to move.

Solution (4 moves)

1. Opponent setup: Rxd7 — rook f7→d7, captures knight. Now Black to move.
2. Best move: Qxh2+ — queen c7→h2, captures pawn, gives check. Opponent replies Kf1 (king g1→f1).
3. Best move: Qh1+ — queen h2→h1, gives check. Opponent replies Ke2 (king f1→e2).
4. Best move: Qxg2+ — queen h1→g2, captures pawn, gives check. Opponent replies Ke1 (king e2→e1).
5. Best move: Qf2# — queen g2→f2, delivers checkmate.

Tactical themes

deflection, kingside attack, mate, mate in 4, middlegame, very long. The combination ends with Qf2# delivering checkmate.

Position data

FEN: 2k1r2r/ppqn1R1p/2p3p1/8/3Qp1n1/1BN1P3/PPP3PP/3R2K1 w - - 7 19

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