Chess Puzzle #EC61B — Advanced, Black to move, opening

Position

White: king d2; queen d1; rooks a1/h1; bishops c1/f1; knight c3; pawns a2/b2/c2/d3/e4/g2/h3. Black: king e8; queen d8; rooks a8/h8; bishops g4/h4; knights f3/g8; pawns a7/b7/c7/d6/f7/g7/h7. Black is ahead by 3 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: gxf3 — pawn g2→f3, captures knight. Now Black to move.
2. Best move: Qg5+ — queen d8→g5, gives check. Opponent replies Ke2 (king d2→e2).
3. Best move: Bxf3+ — bishop g4→f3, captures pawn, gives check. Opponent replies Kxf3 (king e2→f3, captures bishop).
4. Best move: Qg3+ — queen g5→g3, gives check. Opponent replies Ke2 (king f3→e2).
5. Best move: Qf2# — queen g3→f2, delivers checkmate.

Tactical themes

attraction, intermezzo, mate, mate in 4, opening, sacrifice, very long. The combination ends with Qf2# delivering checkmate.

Position data

FEN: r2qk1nr/ppp2ppp/3p4/8/4P1bb/2NP1n1P/PPPK2P1/R1BQ1B1R w kq - 0 9

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