The 2012 Biel GM Tournament is certainly proving to be incident packed! In round four Wang Hao defeated Anish Giri to take over as leader with an impressive 3 wins so far.
The other decisive game of the day came from Hikaru Nakamura who won a real see-saw encounter with Alexander Morozevich's replacement, Victor Bologan.
Magnus Carlsen tried hard to earn a victory against Etienne Bacrot with the black pieces, but the Frenchman held on for a draw.
The standings after 4 rounds (3-1-0 scoring system):
The festival also includes many other events including a Master Tournament, Main Tournament, Rapid Tournament and a Blitz Tournament.
The Biel Chess Festival runs from 21 July - 3 August. The main GM tournament started on Monday 23 July and there is one rest day on Sunday 29 July, with the final round on 2 August. Magnus Carlsen is defending the title he won in 2011.
The Grandmaster Tournament games start at 14:00 local time (12:00 UTC) and a live broadcast is available at this link.
Games via TWIC.