Chess Puzzle #O66Dy — Master, White to move, middlegame

Position

White: king g1; queen d1; rooks a1/e1; bishop f4; knight c3; pawns a5/b2/c2/e5/f2/g4/h3. Black: king c8; queen d7; rooks d8/h8; bishops f8/g6; pawns a6/b7/c4/c5/d5/f7/g7/h7. Black is ahead by 1 point of material. White to move.

Solution (4 moves)

1. Opponent setup: h5 — pawn h7→h5. Now White to move.
2. Best move: e6 — pawn e5→e6. Opponent replies fxe6 (pawn f7→e6, captures pawn).
3. Best move: Na4 — knight c3→a4. Opponent replies Bd6 (bishop f8→d6).
4. Best move: Nb6+ — knight a4→b6, gives check. Opponent replies Kc7 (king c8→c7).
5. Best move: Nxd7 — knight b6→d7, captures queen.

Tactical themes

advantage, fork, middlegame, very long. The key move is e6.

Position data

FEN: 2kr1b1r/1p1q1ppp/p5b1/P1ppP3/2p2BP1/2N4P/1PP2P2/R2QR1K1 b - - 1 18

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