Chess Puzzle #aDGqq — Advanced, Black to move, middlegame

Position

White: king c1; queen e2; rook d1; bishop f4; knight e5; pawns a3/c2/d4/e4/g5. Black: king e8; queen b6; rook b5; knight d7; pawns a4/b7/c6/e6/f7/g7. White is ahead by 2 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Nc4 — knight e5→c4. Now Black to move.
2. Best move: Rb1+ — rook b5→b1, gives check. Opponent replies Kd2 (king c1→d2).
3. Best move: Qxd4+ — queen b6→d4, captures pawn, gives check. Opponent replies Qd3 (queen e2→d3).
4. Best move: Qf2+ — queen d4→f2, gives check. Opponent replies Kc3 (king d2→c3).
5. Best move: Rxd1 — rook b1→d1, captures rook.

Tactical themes

advantage, deflection, fork, interference, middlegame, very long. The key move Qxd4+ captures with check, forcing a response.

Position data

FEN: 4k3/1p1n1pp1/1qp1p3/1r2N1P1/p2PPB2/P7/2P1Q3/2KR4 w - - 3 23

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