Chess Puzzle #bLwtu — Advanced, White to move, middlegame

Position

White: king b1; queen c4; rook c1; bishop e2; pawns a2/b2/e4/f3/g2. Black: king b7; queen f6; rook c8; bishop g3; pawns a5/b6/c6/e6/f7/g5/h6. Black is ahead by 2 points of material. White to move.

Solution (4 moves)

1. Opponent setup: Bf4 — bishop g3→f4. Now White to move.
2. Best move: Qa6+ — queen c4→a6, gives check. Opponent replies Kc7 (king b7→c7).
3. Best move: Qa7+ — queen a6→a7, gives check. Opponent replies Kd8 (king c7→d8).
4. Best move: Rd1+ — rook c1→d1, gives check. Opponent replies Ke8 (king d8→e8).
5. Best move: Qd7+ — queen a7→d7, gives check.

Tactical themes

advantage, endgame, very long. The key move is Qa6+.

Position data

FEN: 2r5/1k3p2/1pp1pq1p/p5p1/2Q1P3/5Pb1/PP2B1P1/1KR5 b - - 3 25

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