Chess Puzzle #JDL5W — Advanced, Black to move, middlegame

Position

White: king h1; queen c8; rooks a1/b6; pawns a5/b2/e5/g3/h2. Black: king a7; queen e4; bishop h6; pawns d5/e6/h7. White is ahead by 9 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Kg1 — king h1→g1. Now Black to move.
2. Best move: Be3+ — bishop h6→e3, gives check. Opponent replies Kf1 (king g1→f1).
3. Best move: Qf3+ — queen e4→f3, gives check. Opponent replies Ke1 (king f1→e1).
4. Best move: Qf2+ — queen f3→f2, gives check. Opponent replies Kd1 (king e1→d1).
5. Best move: Qd2# — queen f2→d2, delivers checkmate.

Tactical themes

endgame, fork, mate, mate in 4, very long. The combination ends with Qd2# delivering checkmate.

Position data

FEN: 2Q5/k6p/1R2p2b/P2pP3/4q3/6P1/1P5P/R6K w - - 1 30

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