An intermediate move...

10/29/2009 – ...can completely change the evaluation of a position in one single moment. Here 34.Nc4xe5 had just been played,, and now Black inserted 34....g3 (diagram) in an attempt to deflect White's queen and prevent his pawn d4 from being taken. What do you say on this? A) good idea, 35.Qxg3 fxe5 is forced, reducing any black disadvantage to a minimum; B) White has a trick with a discovered attack in the e-file; C) Black jumps out of the frying pan into the fire since d4 is falling anyway. The solution is here, but first ponder over it with a  larger version of the diagram.