Chess Puzzle #EjWtE — Expert, Black to move, endgame

Position

White: king g3; queen b5; pawns c3/h3. Black: king c2; queen f6; pawns a7/d5/g6. Black is ahead by 1 point of material. Black to move.

Solution (4 moves)

1. Opponent setup: Qxd5 — queen b5→d5, captures pawn. Now Black to move.
2. Best move: Qxc3+ — queen f6→c3, captures pawn, gives check. Opponent replies Kg4 (king g3→g4).
3. Best move: Qb4+ — queen c3→b4, gives check. Opponent replies Kf3 (king g4→f3).
4. Best move: Qb3+ — queen b4→b3, gives check. Opponent replies Qxb3+ (queen d5→b3, captures queen, gives check).
5. Best move: Kxb3 — king c2→b3, captures queen.

Tactical themes

crushing, endgame, queen endgame, very long. The key move Qxc3+ captures with check, forcing a response.

Position data

FEN: 8/p7/5qp1/1Q1p4/8/2P3KP/2k5/8 w - - 5 51

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