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

Position

White: king g1; queen e2; rooks b3/c1; bishop c4; knight e7; pawns a5/d6/f2/h2. Black: king b8; queen a8; rooks c8/d8; bishops c5/g2; pawns a6/b4/e5/f6/f7/h6. Black is ahead by 2 points of material. Black to move.

Solution (4 moves)

1. Opponent setup: Nxc8 — knight e7→c8, captures rook. Now Black to move.
2. Best move: Rg8 — rook d8→g8. Opponent replies Rg3 (rook b3→g3).
3. Best move: Rxg3 — rook g8→g3, captures rook. Opponent replies hxg3 (pawn h2→g3, captures rook).
4. Best move: Bh3 — bishop g2→h3. Opponent replies Qf1 (queen e2→f1).
5. Best move: Bxf1 — bishop h3→f1, captures queen.

Tactical themes

advantage, middlegame, pin, very long. The key move is Rg8.

Position data

FEN: qkrr4/4Np2/p2P1p1p/P1b1p3/1pB5/1R6/4QPbP/2R3K1 w - - 0 28

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