Chess Puzzle #MitAb — Intermediate, Black to move, middlegame

Position

White: king f2; queen c2; bishop e3; pawns b5/e4/f3/g2/h2. Black: king g8; queen a3; pawns b3/e5/f7/g7/h6. White is ahead by 3 points of material. Black to move.

Solution (3 moves)

1. Opponent setup: Qc3 — queen c2→c3. Now Black to move.
2. Best move: Qa2+ — queen a3→a2, gives check. Opponent replies Kg3 (king f2→g3).
3. Best move: b2 — pawn b3→b2. Opponent replies Bxh6 (bishop e3→h6, captures pawn).
4. Best move: b1=Q — pawn b2→b1, promotes to queen.

Tactical themes

advanced pawn, advantage, endgame, long, promotion. The key move is Qa2+.

Position data

FEN: 6k1/5pp1/7p/1P2p3/4P3/qp2BP2/2Q2KPP/8 w - - 0 37

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