Chess Puzzle #Ubm0q — Master, Black to move, middlegame

Position

White: king g1; queen d1; rooks c1/f1; bishops a3/e2; pawns b3/b5/c4/d5/f2/g2/h3. Black: king f8; queen g6; rook a8; bishop f6; knights e4/e5; pawns a7/b7/c7/d6/f4/g7/h7. White is ahead by 2 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Bf3 — bishop e2→f3. Now Black to move.
2. Best move: Nxf3+ — knight e5→f3, captures bishop, gives check. Opponent replies Qxf3 (queen d1→f3, captures knight).
3. Best move: Ng5 — knight e4→g5. Opponent replies Qg4 (queen f3→g4).
4. Best move: h5 — pawn h7→h5. Opponent replies Qd1 (queen g4→d1).
5. Best move: f3 — pawn f4→f3.

Tactical themes

advantage, kingside attack, middlegame, pin, very long. The key move Nxf3+ captures with check, forcing a response.

Position data

FEN: r4k2/ppp3pp/3p1bq1/1P1Pn3/2P1np2/BP5P/4BPP1/2RQ1RK1 w - - 2 21

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