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Up Topic The Rybka Lounge / Computer Chess / The Cheap and fast
- - By stephenNJUKI (**) Date 2007-02-17 09:01
PCs are becoming cheaper and faster. Is this helping us better understand chess, I think NOT. Here is why.

Engines running on this new fast hardware tend to prune moves excessively earlier on in a game and this tends to yield too many similar games within a given opening. The only 'advantage' they have is speed. Lets look at a 500 match tournament between to engines on these different hardware. With most of today's GUI's you can determine the duration of this tournament by a setting such as tournament game in 5 minutes. What this means is that this tournament will have a simillar duration on both the old 'slow' hardware and our new hardware. The difference will be that the matches on the fast hardware will be more pruned and searched to a greater depth than those on the old machine and as a consequence will not vary by much in lines of play. In otherwards the slow machine tends to be a better explorer and since its known that engines are generally very poor at evaluating the opening to middle game transition, perharps what we need is slower hardware.

Mr Vasik Rajlich has said when using the Randomizer feature in Rybka 2.3 its best to limit search ply to around 10 or 11.. all in an effort to acquire more knowledge (through variety of play) in a position that is being examined. But pragmatically speaking engines need to search beyond this during the middle game to end game transition.

So does the Randomizer work best on 'slower' hardware?.. since if the tournaments duration is set, in the end it will last the same time on fast hardware.
Parent - - By joshua2 (*) [us] Date 2007-02-27 20:39
Well, I'm not sure I follow completely, and I've never used the randomizer yet, but if you set it to 10 or 11 ply it doesn't matter if you have the fastest computer in the world or the slowest, it is going to do basically the same search. It will just take different amounts of time. If instead of setting ply depth you set it by time then computer speed will matter.
Parent - - By Michael Waesch [de] Date 2007-02-27 22:09
I tend to disagree. My experiments with slower computers show that they come to other moves than significantly faster computers at the same ply level.

Mike
Parent - By joshua2 (*) [us] Date 2007-02-27 23:15
The mp versions of Rybka have some randomization in them...
Up Topic The Rybka Lounge / Computer Chess / The Cheap and fast

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