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Subject: Re: Debugging a chess program

Author: Mridul Muralidharan

Date: 04:24:37 12/21/03

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On December 20, 2003 at 21:20:11, Anthony Cozzie wrote:

>On December 20, 2003 at 18:53:45, Russell Reagan wrote:
>
>>I have a question for chess programmers. I'd like to know some of the methods
>>that you use to find bugs in your chess programs. A few that come to mind are:
>>
>>Perft, to debug movegen/make/undo
>>
>>Mirroring/rotating/etc. the board to test evaluation
>>
>>Creating an independent version of your search that will run in parallel in a
>>debug build, and verifying that the positions match after each move that is made
>>or undone. For instance, the independent version could be a completely different
>>board representation, 0x88 and bitboards (or whatever).
>>
>>Any other methods that you use to find bugs?
>
>zappa has a "debug log" option where all information is recorded to file, and a
>graphical program to display _exactly_ what the program did: alpha, beta, m
>oves, move ordering, transposition stuff, etc.
>
>anthony

That is neat !
My trace search will just spew out huge junk onto the console that I will then
have to manually analyse and find errors with.
This is a nice idea though !
Do you use error codes or something in case you want to find out what the errors
were ?

Thanks
Mridul



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