Rating 1910 · Advanced · advantage, endgame, long.
White: king c1; queen c4; rooks d1/d5; pawns a2/b2/c2/e4/f2/g2/h2. Black: king g8; queen e6; rooks b8/e8; pawns a7/b6/c5/c7/f6/g7/h7. Material is balanced. Black to move.
Black's combination exploits White's overextended rook on d5 and undefended queen on c4. After 1...c6, the rook is forced to capture on c5 (the only active square), and 2...bxc5 removes White's rook while simultaneously unblocking the c-file for Black's rook on e8. When White desperately tries 3.Qxe6+ to create a check, the rook recaptures on e6 with a decisive material advantage: Black has rook + three pawns against White's rook and queen-for-rook is already favorable, but here Black regains material with interest. The queen on c4 had no defender once the rook abandoned d5, and the check on e6 came too late to save the position—White merely trades queen for queen and rook, leaving Black up a clean rook.
Recognize when an opponent's piece (here the rook on d5) is forced to move away from defending a second piece (the queen on c4). The 'discovery' often comes from creating a forcing threat that removes the defender—not a tactical blow, but a quiet pawn move that makes the opponent commit their rook. Then exploit the undefended piece with tempo. This pattern teaches patience: sometimes the winning move is not a capture but a quiet move that forces your opponent into a losing sequence.
advantage, endgame, long. The key move is c6.
FEN: 1r2r1k1/p1p3pp/1p2qp2/2pR4/2Q1P3/8/PPP2PPP/2KR4 w - - 2 22
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Analysis generated with Stockfish 18 and AI assistance. Puzzle data from the Lichess puzzle database (CC0).