Chess Puzzle #p4q3X — Master, Black to move, endgame

Position

White: king b3; knight c7; pawns a7/b4. Black: king e4; rook f8; pawn d3. Black is ahead by 1 point of material. Black to move.

Solution (4 moves)

1. Opponent setup: a8=Q+ — pawn a7→a8, promotes to queen, gives check. Now Black to move.
2. Best move: Rxa8 — rook f8→a8, captures queen. Opponent replies Nxa8 (knight c7→a8, captures rook).
3. Best move: Kf3 — king e4→f3. Opponent replies Kc3 (king b3→c3).
4. Best move: Ke2 — king f3→e2. Opponent replies Kc4 (king c3→c4).
5. Best move: d2 — pawn d3→d2.

Tactical themes

advanced pawn, crushing, endgame, very long. The key move Rxa8 wins material.

Position data

FEN: 5r2/P1N5/8/8/1P2k3/1K1p4/8/8 w - - 0 50

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