Chess Puzzle #Zwtts — Master, White to move, endgame

Position

White: king h2; bishop d7; pawns f6/g4/h4. Black: king f4; rook g3; pawns a5/b3/g7/h7. Black is ahead by 3 points of material. White to move.

Solution (3 moves)

1. Opponent setup: b2 — pawn b3→b2. Now White to move.
2. Best move: f7 — pawn f6→f7. Opponent replies Ke3 (king f4→e3).
3. Best move: f8=Q — pawn f7→f8, promotes to queen. Opponent replies b1=Q (pawn b2→b1, promotes to queen).
4. Best move: Qa3+ — queen f8→a3, gives check.

Tactical themes

advanced pawn, advantage, endgame, long, promotion. The key move is f7.

Position data

FEN: 8/3B2pp/5P2/p7/5kPP/1p4r1/7K/8 b - - 0 46

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