The rounds get better and better! There was one disappointingly short draw (Jobava-Godena), which was very messy looking when the players called it day on move 21, but the other four games finished with a winner.
First up, Safarli-Caruana. Safarli's play looked quite original - perhaps a little too original. His Qb1-a2 maneuver, for instance, connected the rooks while bringing the queen to a potentially useful diagonal and in the area of Black's weak light squares on the queenside. The only problem is that with the queen far away from the kingside, Black turned his attention there. White's further decision to play 23.Ne4 and 24.Nxf6+ sealed his own fate - Black's pieces poured in from all directions, and White resigned on the verge of getting mated.
The next game to finish was Brunello-Kamsky. The Fianchetto Grunfeld with ...c6 + ...d5 is very solid and not at all easy for Black to win, but such grinding positions are right up Kamsky's alley. Brunello's idea starting with 18.Ne4 and leading to an exchange sac was clever, but probably a bit better for Black. Still, White was equal until 29.Nd3? (29.g4, ousting the strong Nf5, or 29.Nb3 to block up the b-file were both better.) Perhaps Brunello missed that after 29...Rb1 30.Rxb1 Rxb1+ 31.Kg2 Qa8+ he couldn't play 32.Kh3 because 32...Qf3 wins - White is powerless against the threat of 33...Rh1 followed by ...Qh5+. He thus had to play 32.d5, giving away the pawn for nothing. Kamsky soon won the a-pawn as well, after which the Q+R vs. Q+B ending was an easy win. That guaranteed Kamsky at least a tie for first at the end of the round.
Landa-Vocaturo tested a popular line of the Dragon (9.0-0-0 d5 10.Kb1 Nxd4 11.e5 Nf5 12.exf6 exf6 [rather than Golubev's queen sac line 12...Bxf6 13.Nxd5 Qxd5 14.Qxd5 Ne3 15.Qd2/3 Nxd1 16.Qxd1 Be6, generally considered slightly better for White after 17.Bb5 followed by Ba4 and Bb3]). They followed a 2009 Nisipeanu-Radjabov game through White's 22nd move, and then we have the following options:
(1) Follow the original: That game went 22...Qa4+ 23.Kc1 Qxe8 24.Qxe8 Ne4 25.Rd1 Nf6 with only a very slight edge for White. Radjabov drew, but White may have some other ways to cause trouble.
(2) Follow the computer: It also suggests 22...Qa4+, but after 23.Kc1 it's high on 23...Nb3+ - at least for a moment. Follow the line, however, and it reconsiders: 24.axb3 Qxf4+ 25.Kb1 Qh6 and now White wins with 26.Rhe1 followed by 27.Rxf8+ Qxf8 28.Re8.
(3) Something else: Vocaturo chose to give up the queen without the intermediate check. 22...Qxe8 23.Qxe8 Ne4 24.Rd1 Nf6 was played, and like option (1) White has a small edge. After 25.Qd8 Black might consider 25...Kg7 as a possible improvement, extricating himself from one of the back rank pins. After 25...Nh5 and the queen vs. three minor piece ending that ensued White's edge was more substantial.
The end was pretty funny. White's winning chances were mostly based on his 3-1 queenside majority, so of course the win came when his 3-4 minority on the kingside turned into a 2-1 edge with a pair of voracious passers. Landa sacrificed his queen for the Black passer, and before creating a new queen (or two) Vocaturo gave up.
The last game to finish was between Bologan (the comeback kid) and Almasi (the co-leader). Bologan made serious progress against Almasi's Berlin, and would have maintained a winning advantage with 37.Ke1 followed by Bf2 and only then returning the knight into play with Ng3. The way Bologan handled the position with 37.Bh2 followed by 38.Ng3 allowed Black's potentially weak c-pawn become a strength. White eliminated the pawn at the cost of his bishop, and the result should have been a draw. For instance, 47.Kg1 Rg2+ 48.Kf1 (covering e2) Rxh2 49.Rc7+ Kd8 50.e7+ Ke8 51.Rc8+ Kxe7 52.Rxa8 is a dead draw.
Bologan played 47.Ke3?! instead, and after 47...Rxh2 48.Rc7+ Kd8 49.Rf7? (49.e7+ Ke8 50.Rc8+ Kxe7 51.Rxa8 Rxh3+ 52.Ke4 Rxa3 53.Kd5! gives White enough counterplay to draw) 49...Rxh3+ 50.Kd4 Bf3 51.Rxf6 Bxg4 52.Ke5 Rf3 White would have to fight for the draw rather than collecting it in his sleep. Indeed, he immediately went astray with the losing 53.Rxh6 - 53.Kd6 keeps drawing chances - and the rest was a matter of (slow) technique. (The bishop + wrong rook pawn aspect is overcome by the addition of a pair of rooks.) So Bologan fell back to 50%, while Almasi rejoined Kamsky in first place with three rounds to go.
Standings After Round 6:
1-2. Almasi, Kamsky 4½
3-4. Caruana, Godena 3½
5-7. Jobava, Bologan, Landa 3
8. Safarli 2½
9. Brunello 1½
10. Vocaturo 1
More info, and games, here.