Chess Puzzle #eU4ZW — Expert, Black to move, middlegame

Position

White: king b1; queen g6; rook d1; bishop h3; pawns a2/b2/c2/e5/f4/g3/h2. Black: king b8; queen c6; rook b5; bishop f8; pawns a6/b7/d5/e6/h5. White is ahead by 2 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Qxe6 — queen g6→e6, captures pawn. Now Black to move.
2. Best move: Rxb2+ — rook b5→b2, captures pawn, gives check. Opponent replies Ka1 (king b1→a1).
3. Best move: Rxa2+ — rook b2→a2, captures pawn, gives check. Opponent replies Kxa2 (king a1→a2, captures rook).
4. Best move: Qxc2+ — queen c6→c2, captures pawn, gives check. Opponent replies Ka1 (king a2→a1).
5. Best move: Qxd1+ — queen c2→d1, captures rook, gives check.

Tactical themes

attraction, crushing, endgame, fork, sacrifice, very long. The key move Rxb2+ captures with check, forcing a response.

Position data

FEN: 1k3b2/1p6/p1q1p1Q1/1r1pP2p/5P2/6PB/PPP4P/1K1R4 w - - 3 31

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