Anand vs Kramnik, game 1

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drmellie

Anyone know why not 13...Rxc6?  Kramnik would have to move his queen to safety and then black could take the night on g4.  I'm guessing it would be no different than the text...just a transformation/juxtaposition, but I thought 13...Rxc6 would or could gain some attack.?

ELBEASTO

rxc6 throws away positional advantage.

drmellie

How so?  That's what I don't understand, what is the difference between Rxc6 for move 13 and Rxc6 for move 14?