Complex sentence: The 17th International Computer Games Championship, 20th World Computer Chess Championship and a scientific conference on computer games was held in Yokohama, Japan from 12 August to 18 August 2013.
Split into simpler sentences: The 17th International Computer Games Championship, 20th World Computer Chess Championship and a scientific conference on computer games will be held in Yokohama, Japan. The events are scheduled from 12 August to 18 August 2013.