Has the 50 move rule been used in serious games? There are a lot of questions about the 50-move rule; details on how to claim the draw, why the number 50, etc...

But the most interesting question seems to be whether the rule has ever been applied in an actual game! (N.B. I am referring to serious sanctioned games only). To be more concrete:


  Is there any official game between FIDE masters or above which ended in a draw as a result of one of the players invoking the 50-move rule?
Yes, many times. Ivanchuk- Kamsky 2009 is one example, but there are hundreds if not thousands of others. Ushenina - Girya 2013 made some news recently because Ushenina couldn't mate with knight and bishop in time.