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

Position

White: king e2; rook f1; bishop e7; pawns a3/c4/d6. Black: king h7; queen a1; bishop d4; pawns a4/g7/h6. Black is ahead by 4 points of material. White to move.

Solution (4 moves)

1. Opponent setup: Qxf1+ — queen a1→f1, captures rook, gives check. Now White to move.
2. Best move: Kxf1 — king e2→f1, captures queen. Opponent replies Bc5 (bishop d4→c5).
3. Best move: Bf8 — bishop e7→f8. Opponent replies Bxa3 (bishop c5→a3, captures pawn).
4. Best move: d7 — pawn d6→d7. Opponent replies Bxf8 (bishop a3→f8, captures bishop).
5. Best move: d8=Q — pawn d7→d8, promotes to queen.

Tactical themes

advanced pawn, crushing, endgame, hanging piece, promotion, very long. The key move Kxf1 wins material.

Position data

FEN: 8/4B1pk/3P3p/8/p1Pb4/P7/4K3/q4R2 b - - 14 52

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