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Subject: Re: Crafty 16.7

Author: Gregor Overney

Date: 17:30:36 06/01/99

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It is a combination of the things: code changes (such as in evaluate.c), number
of processors involved, choice of OS, choice of compiler etc.

It appears like searching a global minimum in a configuration space with lots of
tempting local minima. One slight change, and the search may be unsuccessful.

FEN 8/k7/3p4/p2P1p2/P2P1P2/8/8/K7 w - - 0 1 works on some people's Linux box
using mt=2 and 16.8 (ply = 22) and shows up much later under NT 4 (using mt=2
and 16.8).

But it is an interesting example to proof the point that "things" on NT and
LINUX are handled differently enough that they cause different results for
identical input and source code. Is it VC++ or just the way NT is designed?

Gregor



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