Swedish Chess Computer Association

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The Swedish Chess Computer Association (Swedish: Svenska schackdatorföreningen, SSDF) is an organization that tests computer chess software by playing chess programs against one another and producing a rating list. On September 26, 2008, the list was released with Deep Rybka 3 leading with an estimated Elo rating of 3238. Rybka's listing in June 2006 was the first time a program on the list has passed the 2900 mark. In the year 2000 the ratings of the chess engines in the SSDF rating pool were calibrated with games played against humans.[1]

The SSDF list is one of the only statistically significant measures of chess engine strength, especially compared to tournaments, because it incorporates the results of thousands of games played on standard hardware at tournament time controls. The list reports not only absolute rating, but also error bars, winning percentages, and recorded moves of played games.

The SSDF's current testing platform is an Intel Core 2 Quad 6600 2.4 GHz with 2 GB of RAM-memory and a 64-bit operating system. From 1984 to 2013, the SSDF top program increased by 1610 points, an average of 55.51 points per year.

Rating list year-end leaders[edit]

Rating list year-end leaders
Year Program Hardware Rating
1984 Novag Super Constellation 6502 4 MHz 1631
1985 Mephisto Amsterdam 68000 12 MHz 1827
1986 Mephisto Amsterdam 68000 12 MHz 1827
1987 Mephisto Dallas 68020 14 MHz 1923
1988 Mephisto MM 4 Turbo Kit 6502 16 MHz 1993
1989 Mephisto Portorose 68020 12 MHz 2027
1990 Mephisto Portorose 68030 36 MHz 2138
1991 Mephisto Vancouver 68030 36 MHz 2127
1992 Chess Machine Schröder 3.0 ARM2 30 MHz 2174
1993 Mephisto Genius 2.0 486/50-66 MHz 2235
1995 MChess Pro 5.0 Pentium 90 MHz 2306
1996 Rebel 8.0 Pentium 90 MHz 2337
1997 HIARCS 6.0 49MB P200 MMX 2418
1998 Fritz 5.0 PB29% 67MB P200 MMX 2460
1999 Chess Tiger 12.0 DOS 128MB K6-2 450 MHz 2594
2000 Fritz 6.0 128MB K6-2 450 MHz 2607
2001 Chess Tiger 14.0 CB 256MB Athlon 1200 2709
2002 Deep Fritz 7.0 256MB Athlon 1200 MHz 2759
2003 Shredder 7.04 UCI 256MB Athlon 1200 MHz 2791
2004 Shredder 8.0 CB 256MB Athlon 1200 MHz 2800
2005 Shredder 9.0 UCI 256MB Athlon 1200 MHz 2808
2006 Rybka 1.2 256MB Athlon 1200 MHz 2902
2007 Rybka 2.3.1 Arena 256MB Athlon 1200 MHz 2935
2008 Deep Rybka 3 2GB Q6600 2.4 GHz 3238
2009 Deep Rybka 3 2GB Q6600 2.4 GHz 3232
2010 Deep Rybka 3 2GB Q6600 2.4 GHz 3227
2011 Deep Rybka 4 2GB Q6600 2.4 GHz 3216
2012 Deep Rybka 4 x64 2GB Q6600 2.4 GHz 3221
2013 Komodo 5.1 MP x64 2GB Q6600 2.4 GHz 3241

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