Swedish Chess Computer Association
The Swedish Chess Computer Association (Swedish: Svenska schackdatorföreningen, Abbreviation: SSDF ) is an independent non-profit association that deals with computer chess and software related to chess. It was founded in August 1984. The aim of the association is to determine the skill level of computer chess programs compared. These are carried out by many volunteers chess games between different chess programs on computers and determined on the basis of the results Elo ratings. As a cooling-off period generally common in tournament chess 120 minutes for the first 40 moves.
SSDF ranking
The determined stars ( SSDF list) reflects the relative playing strength of the programs and is published at irregular intervals. Coordinator and contact person is Thoralf Karlsson. The SSDF ranking provides a common world rankings for the playing strength of chess computers and computer chess programs dar. German readers it was mainly by the journal Computer Chess and Games (CSS ) known in which it was published since 1986 in each current version again and again.
Besides the overview list ( see Related links ), the ( German: the power) the " rating " of the ten best programs indicates as Elo, a detailed table exists (English: Full list) that lists many more programs and other statistical information is provided. Firstly, there is the expression of uncertainty (tolerance), the possible variation range of Elo - specification (eg 34 and -32 Elo points ), these boundaries include the area of twice the standard deviation (2- σ - field ), which is a confidence interval of slightly more than 95 per cent results. , The percentage of won games (English: Won ) and the average Elo ratings of the opponents (English: Average Opponents ): Furthermore, the number of completed games (Games English) is indicated for each program. Furthermore, there is the " long version " of the SSDF list, which is offered as an ASCII text file to download and the hundreds of current and historical programs lists (see links).
Currently, the list leads (3 x64 Intel Core 2 Quad Q6600 2.4 GHz version Deep Rybka ) with an Elo rating of 3232, the program Rybka.
Historical leaders
The following list illustrates the increase in the skill level of artificial intelligence in chess since 1984 based on the Elo best of the SSDF ranking for each year beginning. Note that the reference to this list, that is, the absolute measure of the skill level, over the years, did not remain constant. This is due to the difficult comparison between the skill level of computers and the skill level of human chess players, because computers rarely compete against people under official tournament conditions. ( The computer would say, " because people rarely take Conversely, under official tournament conditions against us computer." )
In an attempt to achieve comparability still as good as possible, the evaluation score was adapted again and again and the list of " renormalized ". Details can renormalization in the below document - be found " PLY / SSDF the story". From such a renormalization example also results in the supposed drop in the skill level of the leader in 1991.
Their figures are therefore not readily comparable. Also, they can not be equated directly with those of human chess players, as they were exclusively determined by games between computers.
Year Rating Program
1984 1822 Fidelity Prestige 4 MHz 1985 1917 Elegance 3.68 MHz 1986 2066 Mephisto Amsterdam 68000 12 MHz 1987 2083 Mephisto Dallas 68000 12 MHz 1988 2125 Mephisto Roma 68020 14 MHz 1989 2136 Mephisto Almeria 68 020 12 MHz 1990 2332 Mephisto Porto Rose 68030 36 MHz 1991 2246 Mephisto Lyon 68030 36 MHz 1992 2274 Mephisto Vancouver 68030 36 MHz 1993 2402 Chess Machine The King 2.0 30 MHz aggr 1994 2346 Mephisto Genius 2.0 MHz 486/50-66 1995 2440 Mephisto Genius 3.0 Pentium 90 MHz 1996 2440 M -Chess Pro 5.0 Pentium 90 MHz 1997 2462 Rebel 8.0 Pentium 90 MHz 1998 2589 Fritz 5.0 Pentium 200 MHz MMX 1999 2576 Hiarcs 7.0 64 MB Pentium 200 MHz MMX 2000 2630 Junior 6.0 MB 128 K6 -2 450 MHz 2001 2709 Chess Tiger 14.0 CB 256MB Athlon 1200 MHz 2002 2759 Deep Fritz 7.0 256MB Athlon 1200 MHz 2003 2791 Shredder 7.04 UCI 256MB Athlon 1200 MHz 2004 2800 Shredder 8.0 CB 256 MB Athlon 1200 MHz 2005 2808 Shredder UCI 9.0 256MB Athlon 1200 MHz 2006 2902 Rybka 1.2 256MB Athlon 1200 MHz 2007 2935 Rybka 2.3.1 arena 256MB Athlon 1200 MHz 2008 3238 Deep Rybka 3 2 GB Q6600 2.4GHz 2009 3232 Deep Rybka 3 2 GB Q6600 2.4GHz 2010 3213 Deep Rybka 3 2 GB Q6600 2.4GHz Deep Rybka 4 2011 3216 2 GB Q6600 2.4GHz Deep Rybka 4 2012 3221 2 GB Q6600 2.4GHz
The last list so far is from the 28 June 2012.