Neil Schemenauer's Web Log

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December 21, 2005

Chess News: Rybka defeats all

A new, much stronger version of the Rybka chess engine appeared this month. The announcement that the 1.0 beta version was 90 to 150 Elo stronger than Shredder 9 was greeted with some understandable skepticism. However, based on engine vs engine tests, it is clearly the strongest chess program to date. Here's the summary of Kurt's tests:

25.5-24.5 (51 %) vs Toga II 1.1
27.5-22.5 (55 %) vs Fruit 2.2.1
28.5-21.5 (57 %) vs Fritz 9
32.5-17.5 (65 %) vs Ruffian 2.1.0
33.0-17.0 (66 %) vs Spike 1.0a Mainz
34.0-16.0 (68 %) vs Junior 9
34.0-16.0 (68 %) vs Shredder 9 UCI !!
35.0-15.0 (70 %) VS Loop List 600
35.5-14.5 (71 %) vs Gandalf 6.0
36.0-14.0 (72 %) vs Hiarcs 9
38.0-12.0 (76 %) vs The King 3.33 !!

A more featureful and bug tested version will be released today.

Unchecked presidential power

A great piece by Bruce Schneier.

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