Topalov back at No.1 on Live Chess Ratings List

How to calculate Live Chess Ratings

You can use FIDE's rating calculator to calculate changes to ratings for every game.

Rtg = Rating of a player according to the previous list

For single game calculations, keep the following values for W

W=1 if the player has won
W=0.5 if the player has drawn
W=0 if the player has lost

For the top player list, use Kval = 10

Example:

If Kasparov returns to play rated events, plays Carlsen and wins one game, the calculation is as follows. (Assuming Carlsen's rating to be 2786)
Rtg = 2812
Rc = 2786
W = 1
Kval =10
Click Calculate.

Kasparov will gain 4.6 points for the win against Carlsen, who in turn, will lose that many points.