Computer Chess Club Archives




Subject: Re: What was Chess Challenger 7 thinking?

Author: Rich Van Gaasbeck

Date: 10:11:45 03/07/02

Go up one level in this thread

On March 07, 2002 at 10:24:42, Fernando Villegas wrote:

>This guy, Ron Nelson, was indeed the programmer of CC7 fidelity unit.   BTW It
>was not that basic as to play or accept ilegal moves. Some day I requested them
>in Fidelity some explanations about the search technique of this machine  and
>the answer was, more or less, the following:
>level 1: just two ply, full width
>level 2: three plys full width
>level 3: I do not remember
>level 4: 4 plys full witdth
>level 5: three full width plys, then two selective
>level 6: two full width plys, then three selective
>level 7: 5 full width plys.

Are you sure you have the order of the levels right?  If I recall correctly the
levels in order of increasing strength are 1, 2, 3, 7, 6, 5, 4.  I'm sure that
level 7 was 3 minutes per move and that one of 4, 5 or 6 was postal, which took

I think (I have the manual at home) the levels went

level 1: 5 seconds
level 2: 15 seconds
level 3: 120? seconds
level 4: postal/mate finder?
level 5: 20 minutes?
level 6: 6 minutes?
level 7: 3 minutes

Does anybody have Ron's current email address?


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