Cj_Devil , i know someone who did it ,the GM Maxime Vachier-Lagrave,but only twice, vs rybka 3, he told me this in his facebook  , i only had 3 draws(hardly) vs rybka 2n2a , but Never won! however, i played  the same engine vs my Chessmaster 11 in the same machine i played in vs Jester , and believe it or not, Chessmaster was winning until Rybka found a draw by repetition (forced) even that rybka has lost a piece! thank you all friends! and hope to see YOUR games better than mine!just post'em!

Pavlekosic; it isn t very hard to beat Chessmaster 11! because i did the achievement 7 times( vs  Tal(twice) ,Fischer :once, Korchnoi : once lasker: once , and Peter Leko's personnality and finnaly a blitz game vs Karpov! lol),  and without any help!, i swear!just study the position carefully and find weak spots in the board! don t try to move quicker , always take your time and you will find it easy! one of the games is in my blog vs Dr Emmanuel Lasker's personnality (intituled ABBA:Dancing Queen  :D )

cool only now if someone could beat rybak

Great win! I find it tough to beat Jester even at 3 sec/move, but then I play terribly against computers and fast opponents, and Jester is very strong.

Are you the real Mikhail Tal? Who defeated Botvinnik in the world championships?

Nice game, but I must admit that its stranged that your atack sucsed against computer. All my experience is with chessmaster and I found imposible to win against stronger oponents without the engame favorable or not. Computer would sack all pieces just to stop the atack. Its almost imposible to win without the endgame in my experience...but evidently not all computer programs got same reasoning;). Nice game never the less.