Chess Puzzle #AczOt — Advanced, Black to move, middlegame

Position

White: king f2; queen a3; pawns b3/d3/e4/f6/g5/h4. Black: king h7; rook a1; bishop h8; pawns a2/d4/f7. White is ahead by 4 points of material. Black to move.

Solution (3 moves)

1. Opponent setup: Qb2 — queen a3→b2. Now Black to move.
2. Best move: Rh1 — rook a1→h1. Opponent replies Qxd4 (queen b2→d4, captures pawn).
3. Best move: a1=Q — pawn a2→a1, promotes to queen. Opponent replies Qxa1 (queen d4→a1, captures queen).
4. Best move: Rxa1 — rook h1→a1, captures queen.

Tactical themes

advanced pawn, advantage, clearance, endgame, long, promotion. The key move is Rh1.

Position data

FEN: 7b/5p1k/5P2/6P1/3pP2P/QP1P4/p4K2/r7 w - - 2 46

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