i've played a little tournament to challenge Deep Rybka 4.
The 8 best chess programs played a 2RR at 40moves/20minutes on my Q6600 @3Ghz.
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Christmas Challenge 2010
1 Houdini 1.5 x64 2CPU 3200 +151 ** 1½ ½1 ½½ 11 11 11 ½1 11.5/14
2 Deep Rybka 4 x64 2CPU 3178 +13 0½ ** ½½ 1½ 1½ ½½ ½1 11 9.0/14
3 Naum 4.2 x64 2CPU 3093 +33 ½0 ½½ ** ½0 ½0 1½ ½1 11 7.5/14
4 Stockfish 1.9.1 x64 2CPU 3159 -66 ½½ 0½ ½1 ** ½1 0½ 0½ ½1 7.0/14
5 Hiarcs 13.2 MP 2CPU 3010 +53 00 0½ ½1 ½0 ** ½½ ½1 10 6.0/14
6 Critter 0.90 x64 2CPU 3138 -118 00 ½½ 0½ 1½ ½½ ** ½½ 0½ 5.5/14 36.75
7 Deep Fritz 12 2CPU 3000 +39 00 ½0 ½0 1½ ½0 ½½ ** 1½ 5.5/14 33.25
8 Deep Shredder 12 x64 2CPU 3029 -77 ½0 00 00 ½0 01 1½ 0½ ** 4.0/14
Best
Johan