For Hikaru Nakamura to overtake Wesley So in the overall Grand Chess Tour standings, a lot of things would have had to go right for him in today's round and in the final round tomorrow, but having drawn his game with Levon Aronian and with So having held against Fabiano Caruana, that ship has sailed. So has won the overall tour and the accompanying $100,000 bonus. By drawing with Caruana, who was and still is the only player within half a point of him, he is in a great position to win the London Chess Classic as well.
So and Aronian had the black pieces, and both were very well-prepared in the openings, equalizing fully and drawing easily. Two other games were drawn, but with more drama.
Vladimir Kramnik gave 1.e4 another punt, something he's been doing a fair amount lately, and Anish Giri played the Najdorf. The last two rounds saw Black get blown away in the Delayed Poisoned Pawn variation, but Kramnik played 6.g3 and went for a purely positional approach. Giri did his best to spice the game up, even giving up a piece for a few pawns. The game finished peacefully, but not from a want of effort or because the game lacked interest.
Maxime Vachier-Lagrave continued his streak of unsuccessful openings, this time against Michael Adams. Adams equalized with Black pretty easily in a 4.d3 Berlin, and event obtained the advantage. To hold, MVL wisely gave up a pawn to reach a rook and four pawns vs. rook and three pawns ending, with all the pawns on the same side.
Finally, Veselin Topalov managed yet another loss; his present score is one out of eight. (Granted, that's still one point more than almost everyone reading this would score, but for Topalov it's a disaster - he has lost almost 27 rating points and has fallen out of the top 18 in the world for the first time in more than two decades.) Today's suffering came at the hands of his conquerer in their 2010 World Championship match, Viswanathan Anand. Anand was ready with a great new idea in a major line of the 5.Bf4 Queen's Gambit Declined: 12...b5! Soon White was in serious trouble, but as has happened more than once in the tournament, Anand let his advantage slip away. Fortunately for him, but not for his snakebitten opponent, White's position remained precarious, and Topalov made further errors and lost. (The games are here, unannotated except for Topalov-Anand. That game has enough analysis to make up for the other four, and then some.)
Here are the last round pairings: