The 3-1-0 scoring system was clearly introduced in response to some players - mainly Nakamura, So and Radjabov - going for lots of short theoretical draws in the preliminary phase of earlier events: the well-known Berlin sideline (mainline?), topical Grunfeld lines and maybe other short draws that had lots of predecessors.
It obviously cannot prevent all draws (only compulsory Armageddon would force decisive results in every game): no questions asked for any of the draws in round 4, two games went to bare kings, Harikrishna-Vidit took 153 moves.
The 3-1-0 scoring system was clearly introduced in response to some players - mainly Nakamura, So and Radjabov - going for lots of short theoretical draws in the preliminary phase of earlier events: the well-known Berlin sideline (mainline?), topical Grunfeld lines and maybe other short draws that had lots of predecessors.
It obviously cannot prevent all draws (only compulsory Armageddon would force decisive results in every game): no questions asked for any of the draws in round 4, two games went to bare kings, Harikrishna-Vidit took 153 moves.