You can watch online chess matches on http://chessbomb.com/ with live annotation by strong chess engine and comments from other players. There is nearly every big envent. Another way is using Fics for observing games.
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I have a general question as a chess learner: which site do you guys go to observe event games? It does not need to be real-time audio analysis, but better to have good annotations for the games. For example the Istanbul 2012 World Chess Olympiad:
http://www.chessolympiadistanbul.com/
Thanks for any hints and input!