Chess Puzzle #yjS6Z — Expert, Black to move, middlegame

Position

White: king b3; queen e5; rooks a1/f1; bishops b2/e2; pawns a2/d5/g2/h2. Black: king g8; queen e7; rooks b4/f8; bishop f2; pawns a6/b5/c5/c7/e3/g7/h7. Material is balanced. Black to move.

Solution (4 moves)

1. Opponent setup: Ka3 — king b3→a3. Now Black to move.
2. Best move: c4 — pawn c5→c4. Opponent replies Qxg7+ (queen e5→g7, captures pawn, gives check).
3. Best move: Qxg7 — queen e7→g7, captures queen. Opponent replies Bxg7 (bishop b2→g7, captures queen).
4. Best move: Ra4+ — rook b4→a4, gives check. Opponent replies Kb2 (king a3→b2).
5. Best move: Kxg7 — king g8→g7, captures bishop.

Tactical themes

advantage, exposed king, intermezzo, middlegame, quiet move, very long. The key move is c4.

Position data

FEN: 5rk1/2p1q1pp/p7/1ppPQ3/1r6/1K2p3/PB2BbPP/R4R2 w - - 0 24

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