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

Position

White: king g2; queen e3; pawns a3/f2/f4. Black: king f7; queen b2; pawns a4/b5. White is ahead by 1 point of material. Black to move.

Solution (5 moves)

1. Opponent setup: Kg3 — king g2→g3. Now Black to move.
2. Best move: Qb3 — queen b2→b3. Opponent replies Kf3 (king g3→f3).
3. Best move: b4 — pawn b5→b4. Opponent replies axb4 (pawn a3→b4, captures pawn).
4. Best move: Qxe3+ — queen b3→e3, captures queen, gives check. Opponent replies Kxe3 (king f3→e3, captures queen).
5. Best move: a3 — pawn a4→a3. Opponent replies Kd4 (king e3→d4).
6. Best move: a2 — pawn a3→a2.

Tactical themes

advanced pawn, crushing, endgame, queen endgame, very long. The key move Qxe3+ captures with check, forcing a response.

Position data

FEN: 8/5k2/8/1p6/p4P2/P3Q3/1q3PK1/8 w - - 0 57

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