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

Position

White: king e4; pawns a3/d3. Black: king f7; pawns a4/b5/d4/e6. Black is ahead by 2 points of material. White to move.

Solution (10 moves)

1. Opponent setup: Kf6 — king f7→f6. Now White to move.
2. Best move: Kxd4 — king e4→d4, captures pawn. Opponent replies Kf5 (king f6→f5).
3. Best move: Kc5 — king d4→c5. Opponent replies Ke5 (king f5→e5).
4. Best move: Kxb5 — king c5→b5, captures pawn. Opponent replies Kd4 (king e5→d4).
5. Best move: Kxa4 — king b5→a4, captures pawn. Opponent replies e5 (pawn e6→e5).
6. Best move: Kb5 — king a4→b5. Opponent replies Kxd3 (king d4→d3, captures pawn).
7. Best move: a4 — pawn a3→a4. Opponent replies e4 (pawn e5→e4).
8. Best move: a5 — pawn a4→a5. Opponent replies e3 (pawn e4→e3).
9. Best move: a6 — pawn a5→a6. Opponent replies e2 (pawn e3→e2).
10. Best move: a7 — pawn a6→a7. Opponent replies e1=Q (pawn e2→e1, promotes to queen).
11. Best move: a8=Q — pawn a7→a8, promotes to queen.

Tactical themes

advanced pawn, endgame, equality, pawn endgame, promotion, quiet move, very long. The key move Kxd4 wins material.

Position data

FEN: 8/5k2/4p3/1p6/p2pK3/P2P4/8/8 b - - 3 44

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