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Subject: Re: Eureka! Voila! Ooh La La! (Thanks Uri!)

Author: Reinhard Scharnagl

Date: 02:32:13 12/04/05

Go up one level in this thread


On December 04, 2005 at 05:25:43, Uri Blass wrote:

>On December 03, 2005 at 23:39:19, chandler yergin wrote:
>
>>All expressions of great Joy.
>>"Eureka cried the ancient Philosopher! The religious have an Epiphany!
>>I just had another Beer.. and it came to me!
>>I finally understand.. (I think) what you guys are doing, and want to do better.
>>(If I don't I'm sure you'll tell me.
>>;)
>>You need a way to Test your Engines; and Tweak them and have irrefutable
>>evidence of performance. In other words, a "Benchmark"; a Baseline for
>>comparison purposes.
>>Most of you use Test Positions! The problem there is, that every Engine will
>>evaluate a poition differently.
>>What is the one thing in Chess that will never change?
>>What is the one Constant that will never change?
>>
>>The number of "possible" moves at various Ply Levels!
>>Here they are:
>>
>> 0  1
>>ply 1 20
>>ply 2 400
>>ply 3 8890
>>ply 4 196812
>>ply 5 4838258
>>ply 6 118251225
>>ply 7 3162798012
>>ply 8 84029997363
>>ply 9 2403434332264
>>ply 10 68265214423776
>>ply 11 2058141026024096
>
>correct numbers can be productive for programmers to check bugs but
>your numbers are not correct
>
>
>A table of perft results for the start position:
>1 20
>2 400
>3 8,902
>4 197,281
>5 4,865,609
>6 119,060,324
>7 3,195,901,860
>8 84,998,978,956
>9 2,439,530,234,167
>10 69,352,859,712,417
>
>Source
>
>http://homepages.caverock.net.nz/~peter/perft.htm
>
>Note that I do not plan to respond to every post that I disagree with you and it
>is a waste of time if you try to teach people in subjects that they know more
>than you.

Hi Uri,

those seems to be numbers of DIFFERENT POSITIONS not of POSSIBLE MOVES.

Reinhard.



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