Dark-squared invasion

11/16/2012 – White's queen on a3 is controlling the vital diagonal to f8. Which continuation gives him the win? A) 29.Qc5 Nd6 30.Rxb5 (Nd7) B) 29.Bb6 Qxb6 30.Bxc4+ Kh7 31.Qxf8 C) both D) neither ChessBase Magazine, larger diagram and solution.

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