Author: George Tsavdaris
Date: 03:16:46 02/18/06
Go up one level in this thread
On February 18, 2006 at 05:48:28, Ryan B. wrote: >On February 18, 2006 at 05:23:42, George Tsavdaris wrote: > >>On February 18, 2006 at 03:35:23, Uri Blass wrote: >> >>>On February 17, 2006 at 20:03:41, William Penn wrote: >>> >>>>I won't try to give examples here, but my impression is like Vincent's. I >>>>regularly compare long analysis from Fruit and Rybka in infinite mode (usually >>>>several hours run time) and their evaluations are remarkably similar, in >>>>general. I haven't noticed any major exceptions. But that's just my impression, >>>>I haven't researched or quantified it. >>>>WP >>> >>> >>>My impression is different based on analysis of correspondence games. >> >>Yes, i also have the same impression with you. >> >>But what is really important is what you said in another post: >>Rybka is missing endgame knowledge that Fruit already has. So i don't think >>there is anyone believe _and if we assume that Rybka is a Fruit-clone_ that >>Vasik actually removed the endgame knowledge Fruit has. As you have shown in >>some endgames, Fruit understands the positions while Rybka not due to missing >>knowledge. >>That can't be explained in another way than the obvious..... >> > > >Just a quick note, Gambit Fruit had less endgame knowledge than Fruit 2.1. Does this make it to play better at endgames or at any other part of the game? If it had that knowledge you removed it would play worse....? > >> >> Also William says about REMERKABLE similarities. All these are simple words >>with no meaning, until he posts the positions that he has seen these remarkable >>similarities as i haven't find any until now.... >> Vincent did the same. Why he doesn't post the "0.1 position" in order to let us >>see the truth instead of only hearing it.....? >> >> >>> >>>I clearly see cases of disagreement and it is not that one is always right. >>> >>>difference of more than 0.5 pawns is significant difference and there were cases >>>when I saw it in practical analysis. >>> >>>The position that I gave is not from my correspondence games but from analysis >>>of one of my tournament games when rybka understand immediatly that black is >>>better and fruit see score that is close to draw (even at depth 3 that is >>>probably depth 5 of other programs because i do not believe vasik's information >>>about depth). >>> >>>I think that if you try unbalanced positions when one side has passed pawns and >>>the other side has material compensation then you can see often significant >>>difference between fruit and rybka and unbalanced positions happen. >>> >>>In one case there was no significant difference in evaluation but there was a >>>significant difference in the suggested move and I believe that rybka's move was >>>simply better. >>> >>>It is important to choose the better move when the evaluation of many moves is >>>almost the same. >>> >>>Uri
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