Light versus dark squares

5/14/2011 – The black queen has a dominating position on d4, and White faces the question whether to attack it directly, indirectly (idea 38.Bxh7+) or not at all. So what's the correct continuation? A) 37.Bc4 B) 37.e5 C) 37.g3 The solution is here, but first ponder over it with a larger version of the diagram.

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