Chess Puzzle #Q6oAQ — Master, White to move, endgame

Position

White: king d5; bishop a3; pawns a2/b5/c6/e4/g4. Black: king c7; rook c2; pawns a4/f6/g5. Material is balanced. White to move.

Solution (5 moves)

1. Opponent setup: Rxa2 — rook c2→a2, captures pawn. Now White to move.
2. Best move: Bd6+ — bishop a3→d6, gives check. Opponent replies Kb6 (king c7→b6).
3. Best move: Bc5+ — bishop d6→c5, gives check. Opponent replies Kxb5 (king b6→b5, captures pawn).
4. Best move: c7 — pawn c6→c7. Opponent replies Rd2+ (rook a2→d2, gives check).
5. Best move: Ke6 — king d5→e6. Opponent replies Rc2 (rook d2→c2).
6. Best move: c8=Q — pawn c7→c8, promotes to queen.

Tactical themes

advanced pawn, crushing, endgame, exposed king, promotion, very long. The key move is Bd6+.

Position data

FEN: 8/2k5/2P2p2/1P1K2p1/p3P1P1/B7/P1r5/8 b - - 4 40

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