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

Position

White: king g2; queen b7; rook f7; bishop e4; pawns b3/e3/f2/g3/h2. Black: king g8; queen e5; rook a1; bishop e2; pawns g6/h7. White is ahead by 3 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Rf4 — rook f7→f4. Now Black to move.
2. Best move: Rg1+ — rook a1→g1, gives check. Opponent replies Kxg1 (king g2→g1, captures rook).
3. Best move: Qa1+ — queen e5→a1, gives check. Opponent replies Bb1 (bishop e4→b1).
4. Best move: Qxb1+ — queen a1→b1, captures bishop, gives check. Opponent replies Kg2 (king g1→g2).
5. Best move: Qf1# — queen b1→f1, delivers checkmate.

Tactical themes

attraction, endgame, mate, mate in 4, sacrifice, very long. The combination ends with Qf1# delivering checkmate.

Position data

FEN: 6k1/1Q3R1p/6p1/4q3/4B3/1P2P1P1/4bPKP/r7 w - - 2 28

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