"David Richerby" <davidr DeleteThis @chiark.greenend.org.uk> wrote in message
news:UID*zSqes@news.chiark.greenend.org.uk...
> Sanny <softtanks DeleteThis @hotmail.com> wrote:
>> Rybka always finds some way to win the game. Only 1 game was played
>> after the improvement. And it hold for 43 moves.
>
> So, if Rybka always wins the games, that means that Rybka is better,
> doesn't it?
Only 1 game was played after the improvement.... Gee, just one game. And
other programmers do hundreds or even thousands of games to determine who's
better and by how much. I wonder what a statistician would say about the
error range for a single datum point?
And how is it lasting 43 moves actually significant... A loss is a loss.
Rybka could just be hunting for more raterial to raise its scores. At
reduced time controls, programs have been known to get greedy rather than
going for a win that is just outside of their search depth.
And if you increase the time for each side by a factor of 10, does GetClub
still match up? Hard to say with Rybka at just 5 seconds a move.
And just what is Rybka's strength at 5sec a move? That's got to be a pretty
drastic reduction. 5 seconds barely gives it enough time to do much of
anything, and certainly not enough time for it to reach its full abilities.
Programs play a lot differently with such drastically reduced search times.
Sure, in blitz games against humans a program's strength goes up. But
against a computer... No.
Would uMax or TSCP or Gnu Chess v1 beat Rybka if they were given 100 seconds
like GetClub?? (grin)
Heck, I might be willing to give odds to Sargon 1 at those time differences.
Especially if all it has to do is last to the 43rd move.
Hey, I have one of those keychain chess computers from Excalibur. Maybe I
should pit it against GetClub chess at those time differences....
No, I'm not actually going to. I don't have any desire to actually go to
GetClub and play chess. The only reason I'd go there is if they described
in detail the chess program there. Unless there is something truely unusual
about the program (selective search, pure knowledge based approach, neural
network, etc.), then I really don't see anything significant about it.
There are too many better programs that are public domain, or MIT or even
GPL'ed.
If the program did indeed use some unusual technique, then I'd be
interested. It's always interesting to hear about some unusual approach.
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