Chess Puzzle #DN6X1 — Advanced, Black to move, middlegame

Position

White: king a1; queen d3; rooks d1/h1; bishop e3; pawns a3/c2/d4/f2/g4. Black: king g8; queen d6; rooks b2/b8; pawns a5/c4/c6/f7/g6/g7. White is ahead by 2 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Qc3 — queen d3→c3. Now Black to move.
2. Best move: R2b3 — rook b2→b3. Opponent replies cxb3 (pawn c2→b3, captures rook).
3. Best move: Qxa3+ — queen d6→a3, captures pawn, gives check. Opponent replies Kb1 (king a1→b1).
4. Best move: Rxb3+ — rook b8→b3, captures pawn, gives check. Opponent replies Qxb3 (queen c3→b3, captures rook).
5. Best move: Qxb3+ — queen a3→b3, captures queen, gives check.

Tactical themes

advantage, exposed king, fork, interference, middlegame, sacrifice, very long. The key move Qxa3+ captures with check, forcing a response.

Position data

FEN: 1r4k1/5pp1/2pq2p1/p7/2pP2P1/P2QB3/1rP2P2/K2R3R w - - 0 27

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