Here's the general info, and then we'll get to some specifics. The annual super-tournament in Wijk aan Zee, sponsored this year by Tata Steel, commences tomorrow. There are in fact three concurrent round-robins, an A-group, a B-group, and - surprise! - a C-group. The first is incredibly strong, the second merely extremely strong, while the third isn't bad but rounds out the entertainment, serves as a qualifier (as does the second: the winner of the B- and C-groups get promoted a section for the next year's event), serves as a GM-norm tournament for some Dutch players and often showcases promising young talents.
All three groups have 14 players and thus 13 rounds, with play starting on the 15th and running through the 30th, with rest days on the 19th, 24th and 27th. The rounds start at 1:30 p.m. CET/7:30 a.m. ET, except for the last round, which starts 90 minutes earlier.
The B- and C-groups are interesting, but it's the A-group that puts the tournament on the map every year. Here are the players in the A-group:
1. Magnus Carlsen 2814
2. Viswanathan Anand 2810
3. Levon Aronian 2805
4. Vladimir Kramnik 2784
5. Alexander Grischuk 2773
6. Hikaru Nakamura 2751
7. Ruslan Ponomariov 2744
8. Ian Nepomniachtchi 2733
9. Wang Hao 2731
10. Alexei Shirov 2722
11. Maxime Vachier-Lagrave 2715
12. Anish Giri 2686
13. Jan Smeets 2662
14. Erwin L'Ami 2624
Strong enough for you? The three Dutch players at the bottom bring the average rating down a little (though I wouldn't be surprised if Giri raises the average in a couple of years), but even with them the average is a ridiculous 2740. The world's top four are playing, and better still there isn't a dull player in the lot.
Who do you think will win? One potential complicating factor for Aronian and Kramnik fans is that they're in the Candidates, which starts May 3, and may be starting their opening disinformation campaigns. Still, that's a ways off, so it's not clear how much they'll keep hidden at this point.