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

Position

White: king b5; bishop c4; pawns a4/e6/f5/h5. Black: king d6; bishop e3; pawns a5/c5/g4/h6. Material is balanced. White to move.

Solution (4 moves)

1. Opponent setup: g3 — pawn g4→g3. Now White to move.
2. Best move: f6 — pawn f5→f6. Opponent replies g2 (pawn g3→g2).
3. Best move: e7 — pawn e6→e7. Opponent replies g1=Q (pawn g2→g1, promotes to queen).
4. Best move: e8=Q — pawn e7→e8, promotes to queen. Opponent replies Qb1+ (queen g1→b1, gives check).
5. Best move: Ka6 — king b5→a6.

Tactical themes

advanced pawn, bishop endgame, crushing, defensive move, endgame, promotion, very long. The key move is f6.

Position data

FEN: 8/8/3kP2p/pKp2P1P/P1B3p1/4b3/8/8 b - - 0 54

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