White’s king is exposed. What is the best way for Black to take advantage of this?
The key to solving this problem is to recognize that Nb3 by Black would be mate if it weren’t for the White queen defending b3. In the game Vaganian-Planinc, Hastings, 1974-75, Black solved this problem with 1…Qc7+ and White either loses his queen or gets mated.
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