Anish Giri was the only winner in round six of the Biel GM tournament, narrowing the gap to leader Wang Hao to just 2 points.
Magnus Carlsen held Hikaru Nakamura to a draw with the black pieces, and Etienne Bacrot's game with Wang Hao also ended with the points shared.
Tomorrow is the tournament's only rest day, but Magnus Carlsen is due to play his must-win postponed game against Victor Bologan.
The standings after round six (3-1-0 scoring system):
Anish Giri (right) beat Victor Bologan to stay in touch with the leader
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.
Picture from the official website. Games via TWIC.
* Bologan's score includes 2 losses by Alexander Morozevich who withdrew due to illness.