From CCC forum "diamonds " :

" Rybka is IMHO a brutal effective and fast searcher. It is as dumb as Toga for example. It has very little knowledge about chess."
See please :

http://64.68.157.89/forum/viewtopic.php?topic_view=threads&p=207235&t=22900

( "It is unfortunate that the game of Chess allows stupidity to prevail. We should just move on and search for another Board game where this can't happen").

Regards,
Silvian