Author: Tord Romstad
Date: 04:50:47 04/12/04
Go up one level in this thread
On April 12, 2004 at 00:09:48, Christophe Theron wrote: >On April 11, 2004 at 13:52:59, Tom Likens wrote: > >>On April 10, 2004 at 21:53:17, Christophe Theron wrote: >> >>>On April 10, 2004 at 15:55:17, Tom Likens wrote: >>>> >>>>I'm not sure where I come down on the bitboards vs. non-bitboard >>>>architectures. My engine is a bitboard engine, but that doesn't >>>>necessarily mean that the next one will be bitboard based. >>>> >>>>I don't believe though, that because no bitboarder has topped the >>>>SSDF list that this really constitutes any kind of proof. My strong >>>>suspicion is that if all the top commercial programmers converted >>>>over to bitboards tomorrow (yourself included) that *eventually* >>>>their new engines would again rise to the top of the SSDF. I'm >>>>beginning to suspect that creating a strong (i.e. world-class) engine >>>>involves a helluva lot more than just the basic data representation, >>>>but instead involves... >>>> >>>>1. 24/7 dedication >>>>2. A *real* way to measure progress >>>>3. A selective search strategy that works 99.99999% of the time >>>>4. Attention to about 2^64 minor details >>>>5. A failed marriage (okay, maybe this is extreme but you see the point) >>>> >>>>regards, >>>>--tom >>> >>> >>> >>>Number 5 (or something close) was the reason why Tiger has made such a progress >>>between 1997 and 1999. :) >>> >>>Number 2, seriously, is worth spending several months on it. >>> >>> >>> >>> Christophe >> >>This has been my main focus over the past few weeks. It's become readily >>apparent to me that the improvement slope from here on up is much steeper >>and I rather not waste my time implementing features that I can't properly >>test. >> >>regards, >>--tom > > > >That's the secret of real professional chess programmers. Of course you don't want to reveal your secrets, but it would be interesting if you could answer the following question: Assume that you make a change to your engine which improves the playing strength by about 10 Elo points. How many hours of CPU time do you need before you are sure that the change was an improvement? Tord
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