Chess Puzzle #ZWtYy — Advanced, White to move, middlegame

Position

White: king a2; queen d4; rook d3; pawns a4/b2/f3/g4. Black: king g8; queen e2; rook c2; pawns e6/f7/g7/h6. Material is balanced. White to move.

Solution (4 moves)

1. Opponent setup: Rxb2+ — rook c2→b2, captures pawn, gives check. Now White to move.
2. Best move: Qxb2 — queen d4→b2, captures rook. Opponent replies Qxd3 (queen e2→d3, captures rook).
3. Best move: Qb8+ — queen b2→b8, gives check. Opponent replies Kh7 (king g8→h7).
4. Best move: Qb1 — queen b8→b1. Opponent replies Qxb1+ (queen d3→b1, captures queen, gives check).
5. Best move: Kxb1 — king a2→b1, captures queen.

Tactical themes

crushing, endgame, pin, very long. The key move Qxb2 wins material.

Position data

FEN: 6k1/5pp1/4p2p/8/P2Q2P1/3R1P2/KPr1q3/8 b - - 0 37

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