Chess Puzzle #wQBSb — Expert, White to move, endgame

Position

White: king c2; queen f4; pawns a2/g3/h4. Black: king c7; queen d8; knight a4; pawns b5/b6/c6. Black is ahead by 3 points of material. White to move.

Solution (5 moves)

1. Opponent setup: Qd6 — queen d8→d6. Now White to move.
2. Best move: h5 — pawn h4→h5. Opponent replies Qxf4 (queen d6→f4, captures queen).
3. Best move: gxf4 — pawn g3→f4, captures queen. Opponent replies Nc5 (knight a4→c5).
4. Best move: h6 — pawn h5→h6. Opponent replies Ne6 (knight c5→e6).
5. Best move: h7 — pawn h6→h7. Opponent replies Nxf4 (knight e6→f4, captures pawn).
6. Best move: h8=Q — pawn h7→h8, promotes to queen.

Tactical themes

advanced pawn, crushing, endgame, promotion, quiet move, very long. The key move is h5.

Position data

FEN: 3q4/2k5/1pp5/1p6/n4Q1P/6P1/P1K5/8 b - - 2 40

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