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Subject: Re: To Bob Hyatt: Ply Number Versus Rating

Author: blass uri

Date: 21:23:26 01/03/99

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On January 03, 1999 at 23:55:45, Robert Hyatt wrote:

>On January 03, 1999 at 21:18:11, Leon Stancliff wrote:
>
>>Bob Hyatt,
>>
>>I think you could probably answer this question if anyone can. Do you know how
>>the rating increases with ply depth. I have seen a figure of 200 points increase
>>per ply. I do not believe this would be a constant figure. My Hiarcs 6 will
>>normally reach 7 ply and sometimes 8 ply in the middle game. Do you have any
>>kind of graph showing what might be expected with each ply increase from 4, 5,
>>6, 7, 8 or 9 plies in the middle game. Does the increase in rating decrease as
>>one moves to higher levels? In other words, do you get as more increase as you
>>move from 7 to 8 than you do from 8 to 9.
>>
>>If anyone else has information on this topic please feel free to add your
>>comments.
>
>A very hard question.  I believe that "dumb" programs get less from another
>ply than "smart" programs.  At shallow depths, another ply helps _every_
>program avoid/find tactics.  At deeper depths, tactics fade out somewhat and
>if the program has little positional knowledge, it won't be able to get any-
>thing out of the extra plies.  A smart program will continue to improve,
>however, as it simply finds deeper "plans" to use its positional knowledge.
>
>How you categorize the various programs would be fun however, as that would
>start a small war here.  My best guess would be to simply take a common
>cpu and run all the programs.  In general, the faster the NPS, the "dumber"
>the program, since the eval is the best place to pick up speed (IE in Crafty,
>I spend over 50% of my time in Evaluate() which is fairly high by today's
>standard.  Although programs like Hiarcs are probably at 75% or so, while a
>program like Fritz is likely at 10% or less.)

I do not think that Hiarcs earn more from time
I read that Hiarcs7 is good at blitz.

If you were right then I would expect hiarcs7 to have better results at
tournament time control(relative to blitz) but I did not see it.

Hiarcs7 won Junior5 at blitz and lost 6:4 against Junior5 at 40/40 games of
enrique.

Uri



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