Playing Strength
Rybka 2.2n2 (which is available as a free download) has been claimed to be rated at 3110 Elo on four CPUs, and Rybka 3 is supposedly about 100 Elo stronger than 2.2n2.
On March 21, 2010, the latest SSDF rating list was released, with Deep Rybka 3 in first place in the rankings with a rating of 3227.
Rybka's search is considered one of its main advantages over rival programs while its efficient design as a bitboard engine lends it an extra 60% processing efficiency when run in 64-bit mode, yielding approximately 40 additional Elo.
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