Chess Engines Grand Tournament, also known as CEGT, is one of the best-known organizations that tests computer chess software by playing chess programs against one another and producing a ratings table.
CEGT routinely tests amateur and professional chess engines in various time controls such as 40/4 (40 moves in 4 minutes, repeating), 40/20 (40 moves in 20 minutes, repeating), and 40/120 (40 moves in 120 minutes, repeating). The 40/120 matches were at one time considered some of the best computer-chess games freely available online, but the list has not been updated since March 2010.
As of September 2009[update], the testers team is composed of eight members co-ordinated by Heinz van Kempen, using a total of 20 personal computers.[1] The team has run more than 480,000 games for 40/20, and more than 750,000 games for 40/4 (Blitz). Games include SMP testing.
As of 10 February 2011[update], Houdini leads the 40/20 rating list standings with 3281 (two CPUs, testing in progress). The second place engine behind other versions of Houdini 1.5a is Deep Rybka 4 with 3246 (six CPUs). The best single-CPU engines are Houdini 1.5a at 3211, and Rybka 4 Exp 61 at 3146.