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Subject: Re: Maths: Fair match between programs on uneven machines

Author: Shep

Date: 08:48:22 02/15/00

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On February 15, 2000 at 09:36:18, Enrique Irazoqui wrote:

>On February 15, 2000 at 09:12:25, Shep wrote:
>
>Hi Shep,
>
>Your math is interesting, but don't you think that the easiest and most accurate
>procedure in the case of uneven hardware is the simple swapping of machines?
>Each program would play half the match on the fast computer and half on the slow
>one.

I think the more uneven the machines are, the more uninteresting the results
become if you're just swapping machines.

Although I'm exaggerating here, imagine you have a P5-90 and an Athlon 1000.
Then take two programs with a noticeable strength difference, e.g. Junior and
CSTal (if Thorsten is offended, you can also take Virtual Chess II instead :).

If you play using my calculations, you will get an interesting match which would
probably be won by Junior like 60:40 or so.
If you play without adjusting the time controls and just swap machines, you will
see either of this happening:
a) both programs wins their series on the fast machine 48:2 for an overall
result of 50:50. This would mean boring one-sided matches and a skewed overall
result.
b) Junior wins 48:2 on the fast machine and loses 12:38 on the slow machine.
This would mean boring one-sided matches when Junior is on the fast machine and
a bunch of one-sided matches when it's on the slow machine.
Either case is not too appealing, especially if you don't use autoplayer.


---
Shep




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