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Subject: Re: Which VC++ compiler options give fast chess engines?

Author: Severi Salminen

Date: 10:06:02 03/12/01

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>Thanks for your reply. After taking your advice,
>I saw that the executable file was much larger.
>In a singe game, the new version lost, but
>this may very well be bad luck, so I think I will
>play a match of, say, 20 games, to compare
>the same program compiled with two different
>settings.

Not a good idea - you will get no idea of which one is faster or stronger.
Instead make your program search a certain position to a fixed depth and compare
NPSs of different version. This is a "good" way to use NPS as comparison and
this is a good way to use single position for comparison. This way you can also
check that the new version is behaving properly by checking that the node count
matches for both versions (for example if you try out a new assembly routine for
move generator etc.).

Severi



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