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

Position

White: king b2; rook d1; pawns b4/b6/c5/h3. Black: king c6; rook a8; pawns a2/e4/h7. White is ahead by 1 point of material. Black to move.

Solution (3 moves)

1. Opponent setup: Re1 — rook d1→e1. Now Black to move.
2. Best move: a1=Q+ — pawn a2→a1, promotes to queen, gives check. Opponent replies Rxa1 (rook e1→a1, captures queen).
3. Best move: Rxa1 — rook a8→a1, captures rook. Opponent replies Kxa1 (king b2→a1, captures rook).
4. Best move: e3 — pawn e4→e3.

Tactical themes

advanced pawn, crushing, endgame, long, master, promotion. The key move is a1=Q+.

Position data

FEN: r7/7p/1Pk5/2P5/1P2p3/7P/pK6/3R4 w - - 0 48

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