Chess Puzzle #I5OkL — Advanced, Black to move, endgame

Position

White: king e2; pawn b7. Black: king d4; pawns c2/e4/f4. Black is ahead by 2 points of material. Black to move.

Solution (3 moves)

1. Opponent setup: b8=Q — pawn b7→b8, promotes to queen. Now Black to move.
2. Best move: c1=Q — pawn c2→c1, promotes to queen. Opponent replies Qd6+ (queen b8→d6, gives check).
3. Best move: Kc3 — king d4→c3. Opponent replies Qc6+ (queen d6→c6, gives check).
4. Best move: Kb2 — king c3→b2.

Tactical themes

advanced pawn, defensive move, endgame, equality, long, promotion, queen endgame. The key move is c1=Q.

Position data

FEN: 8/1P6/8/8/3kpp2/8/2p1K3/8 w - - 0 54

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