Chess Puzzle #ydszy — Expert, Black to move, endgame

Position

White: king d3; queen h8; knight f6; pawns c7/f2. Black: king b4; queen a1; knight d6; pawns b5/e5/e6/g5. Black is ahead by 2 points of material. Black to move.

Solution (3 moves)

1. Opponent setup: c8=Q — pawn c7→c8, promotes to queen. Now Black to move.
2. Best move: Qd1+ — queen a1→d1, gives check. Opponent replies Ke3 (king d3→e3).
3. Best move: Nf5+ — knight d6→f5, gives check. Opponent replies Ke4 (king e3→e4).
4. Best move: Qe2# — queen d1→e2, delivers checkmate.

Tactical themes

endgame, exposed king, long, master, mate, mate in 3. The combination ends with Qe2# delivering checkmate.

Position data

FEN: 7Q/2P5/3npN2/1p2p1p1/1k6/3K4/5P2/q7 w - - 0 40

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