Most of the games in round 4 of the Grand Prix tournament in Khanty-Mansiysk looked like the players wanted to get an early start on Monday's rest day. Two games were drawn in just 23 moves and a third finished at move 30. The draw between Boris Gelfand and Anish Giri was a bit more competitive, as Gelfand had to make a few accurate defensive moves to hold the balance, but it too appeared headed for a draw from early on.
The remaining two games were more eventful. Fabiano Caruana came under some pressure with Black in a Ragozin against Maxime Vachier-Lagrave, but it doesn't look like he was ever in real trouble. MVL, however, got into trouble - fatal trouble - by overextending. The first steps in the wrong direction began with his idea of 21.Qb3 followed by 22.f5, and then 24.Kg2 was a further misstep. White's space advantage looked impressive, but he couldn't quite consolidate it. After 28...d4 Caruana was winning, and while he might have had a minor improvement here or there he never let Vachier-Lagrave back into the game. Caruana is thus the solo leader with 3/4.
Leinier Dominguez and Peter Svidler are half a point behind, and if Evgeny Tomashevsky could have finished off a winning position against Dmitry Jakovenko he'd have joined them with 2.5/4. Tomashevsky thought for more than 20 minutes on his 41st move, but his decision seems to have let the (probable) win slip away. Instead of 41.a5, which let Black get enough counterplay to hold after 41...Ra2, he should have tried the more patient 41.Qc2. It wasn't as big a missed chance as the one he had against Alexander Grischuk in round 2, but it's still a second extra half-point lost. If Tomashevsky misses qualifying for the Candidates by half a point at the end of the tournament, that will surely be a difficult pill for him to swallow.
As noted above, Monday is a rest day. Tuesday's round 5 pairings are as follows: