Chess Puzzle #IYnOy — Master, Black to move, middlegame

Position

White: king e2; rook e1; knight b5; pawns a5/b3/c4/e4/h2. Black: king g4; rook b8; pawns e5/f4/g2/h3. White is ahead by 4 points of material. Black to move.

Solution (3 moves)

1. Opponent setup: a6 — pawn a5→a6. Now Black to move.
2. Best move: f3+ — pawn f4→f3, gives check. Opponent replies Ke3 (king e2→e3).
3. Best move: Rf8 — rook b8→f8. Opponent replies Kf2 (king e3→f2).
4. Best move: Rd8 — rook f8→d8.

Tactical themes

crushing, defensive move, endgame, long, quiet move. The key move is f3+.

Position data

FEN: 1r6/8/8/PN2p3/2P1Ppk1/1P5p/4K1pP/4R3 w - - 4 46

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