Author: Henrik Dinesen
Date: 23:33:52 07/10/05
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On July 10, 2005 at 21:38:58, Lin Harper wrote: > > > Hi Djordje, > In addition to the interesting info in this thread, there are just a couple >of things I would like to add. > In the case of search depth versus knowledge, you quite rightly pointed out >that search depth *is* knowledge. Since the basic problem of a chess programmer >is correct allocation of limited processing capacity, perhaps in the case of >Fruit2.1, the programmer has succeeded in his effort to include only vital, not >unnecessary knowledge, so that the released capacity has driven the search >another ply, or at least part of a ply. This applies to Shredder too, of course. > I remember some time ago the author of Hiarcs saying that he had vastly >increased the knowledge in his new version. This could only have come at the >expense of search depth, and so was a mistake. > Just one other point re: Fruit2.1. I could'nt help notice that Fruit2.1 has a >preference for knights over bishops. This I noticed over a series of too many >games played on Arena for it to be random. I'm only guessing, but could it be >that the knight, handled correctly, is a stronger piece overall than a bishop? >And that this has not been recognized in the chess community until now simply >because it has been impossible to search deep enough to demonstrate? Food for >thought. > all the best > Lin Knight vs bishops? I don't believe the chess community has overlooked anything in that respect. In general the knight can be very strong closed/semi-closed positions - especially if has a centralized outpost and isn't released to early, and it's cabable of covering both white and black colored aquares, opposite to one bishop. I haven't noticed this tendency of Fruit (but you're probably right; this can be because you've looked at closed/semi-closed games), but what I've seen several times, was that it sacrificed a light piece in the late middlegame for 2-3 pawns going for a promotion. Often the opponent couldn't see the idea at that early stage, and showed a high eval in it's own favor - sometimes rightly, sometimes not. Regards Henrik
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