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Subject: Re: To programmers: Hints for testing after a partial rewrite

Author: Mridul Muralidharan

Date: 02:54:01 12/09/03

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On December 08, 2003 at 21:30:56, Federico Corigliano wrote:

>Hi to all
>I rewrote some parts of my engine (about 40%), including move generation and
>data structures, and I want check them for instability, illegal moves, crashes,
>Of course a great number of games against other engines is in my todo list, but,
>you can recommend me some kind of special test to help in the bug checking?
>Also, once that I have a bug, are there special utilities that you can recommend
>me to help me in the debugging and localization of the bug?

For move generation testing : perft is useful.
For eval testing : using mirrored fen's are useful.
Also , in case you want to find out uninitialised arrays/variables , etc : test
bettwen debug and release versions - the node count , pv , stats (like cutoff
rates , etc) should be identical.
Also , if you support multiple platform , test between platforms and ensure that
the output remains the same for same search parameters.
Using a boundschecker helps to indentify obvious bounds bugs.
If your program is parallel - becomes more complicated ...

Hope this helps,

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