This site is one of a kind. It has information about all the upcoming chess tournaments as well as on going and old tournaments. It’s an extremely useful site for chess players.
One can check out the pairings of an ongoing tournament from this site. This is pretty useful because usually the pairings are updated first on this site and hence having checked the pairings one can start preparing for the next round immediately.
This site also gives the information about ratings of a chess player and how well or badly has he performed in a a particular tournament. One just has to click over a players name in the respective tournament list and one can get all the information about the player like his results and ratings of the opponent with whom he played, his rating increase / decrease etc.
We can also see the buchols in this site which is pretty useful for rechecking and confirmation of the calculations of two players with the same points.
We can also check out the list of players participating in a particular tournament prior to the tournament. This is useful for players who need to judge the strengh of the tournament before playing it.
This site provides information about almost all the tournaments happening all over the globe!
The only thing I would want them to improve upon is the design of the site. It’s pretty dry and they can crank it up a bit!
It is indeed the best and the only site with all such tools! Love it!