Chess Puzzle #BJQBQ — Master, Black to move, middlegame

Position

White: king h1; queen c8; rook a1; bishop e6; pawns a2/b2/c3/d5/e4/g3/h3. Black: king h7; queen h6; rook f8; knight g6; pawns a7/c7/d6/e5/g5/g7. White is ahead by 1 point of material. Black to move.

Solution (4 moves)

1. Opponent setup: Qxc7 — queen c8→c7, captures pawn. Now Black to move.
2. Best move: g4 — pawn g5→g4. Opponent replies Bxg4 (bishop e6→g4, captures pawn).
3. Best move: Rf2 — rook f8→f2. Opponent replies Qxa7 (queen c7→a7, captures pawn).
4. Best move: Qd2 — queen h6→d2. Opponent replies Qxf2 (queen a7→f2, captures rook).
5. Best move: Qxf2 — queen d2→f2, captures queen.

Tactical themes

advantage, endgame, pin, sacrifice, very long. The key move is g4.

Position data

FEN: 2Q2r2/p1p3pk/3pB1nq/3Pp1p1/4P3/2P3PP/PP6/R6K w - - 4 29

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