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

Position

White: king c1; queen f3; rooks d1/h1; bishops f1/f4; knight h8; pawns a2/b2/c2/d4/e3/f2/g5/h2. Black: king e8; queen a4; rook a8; bishops b7/e7; knights d7/e4; pawns a6/b4/c5/d5/e6/g7/h7. White is ahead by 3 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Qh5+ — queen f3→h5, gives check. Now Black to move.
2. Best move: g6 — pawn g7→g6. Opponent replies Qxh7 (queen h5→h7, captures pawn).
3. Best move: Qxa2 — queen a4→a2, captures pawn. Opponent replies Qxg6+ (queen h7→g6, captures pawn, gives check).
4. Best move: Kd8 — king e8→d8. Opponent replies Qxe4 (queen g6→e4, captures knight).
5. Best move: dxe4 — pawn d5→e4, captures queen.

Tactical themes

advantage, defensive move, middlegame, very long. The key move is g6.

Position data

FEN: r3k2N/1b1nb1pp/p3p3/2pp2P1/qp1PnB2/4PQ2/PPP2P1P/2KR1B1R w q - 0 14

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