After a closed opening, the position opened up in Svidler's favour. 20.Qb3 seemed to be the turning point of the game, as after that Karjakin had to meet a succession of threats, with his position getting steadily worse. By move 26 Svidler was totally winning, and Karjakin resigned a few moves later.
Svidler,Peter - Karjakin,Sergey [C00]
2015 World Cup, 01.10.2015