Computer Chess Club Archives




Subject: Re: Rybka code

Author: Zappa

Date: 08:03:47 12/12/05

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On December 12, 2005 at 07:18:32, Chrilly Donninger wrote:

>On December 12, 2005 at 05:04:24, ludicrous wrote:
>>Hi Dr, Donninger, it's nice to hear from you again!
>>You have access to Rybka's source codes?
>Everyone has of any programms he owns the detailed source-code. After all the
>Intel processor must also know what to do. Its just a matter if you can read
>assembly code or not.
>The code from where I know that Rybka uses PVS:
>.text:0040D156                 call    sub_40D1B0
>.text:0040D15B                 mov     esi, eax
>.text:0040D15D                 lea     eax, [esp+278h+var_238]
>.text:0040D161                 push    eax
>.text:0040D162                 push    edi
>.text:0040D163                 neg     esi
>.text:0040D165                 call    sub_40A780
>.text:0040D16A                 add     esp, 18h
>.text:0040D16D                 cmp     esi, [esp+268h+var_25C]
>.text:0040D171                 jle     short loc_40D183
>.text:0040D173                 cmp     esi, ebx
>.text:0040D175                 mov     [esp+268h+var_25C], esi
>.text:0040D179                 jle     short loc_40D183
>.text:0040D17B                 cmp     esi, [ebp+arg_4]
>.text:0040D17E                 mov     [ebp+arg_0], esi
>.text:0040D181                 jge     short loc_40D13A

How can you tell?  And how on earth did you find it?


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