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Subject: Re: Crafty 15_18, a big bad bug?

Author: Robert Hyatt

Date: 10:07:42 10/15/98

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On October 15, 1998 at 12:20:41, Djordje Vidanovic wrote:

>Thanks for looking into this -- I did think that you'd eventually reply :-)
>Of course I unzipped the files :-)(I am not THAT forgetful) and I've got more
>than 2.5 gigs of tablebases on my disk.  My Crafty has access to 76 tablebases
>amongst which are the KRP KR databases and the sizes are, just checked:
>
>536,857,464 tbb
>536,872,010 tbw
>
>I can see now the uneven sizes of these :-( so the downloading must have been
>faulty, right?  (shoot!!!!)
>
>What sidetracked me was my checking up on the Lucena position and the such where
>Crafty, using the KRP KR did so well, finding the win immediately...
>
>Wait :-) I just checked the zipped files and the sizes match the zipped bases
>that you quote!  What is it then? A corrupted file or a bad Winzip prog? Or
>something else... Should I try to unzip the zipped bases again or is it useless?
>

If your zip files match mine exactly (size-wise) you might try unzipping them
again.  But if they don't match each other exactly (and match the size I gave
below) then you have a problem.  I believe that there is also a gunzip.exe on
my ftp machine that you can try if you think your winzip has a bug...

Bob




>
>Regards,
>Djordje
>
>On October 15, 1998 at 10:04:56, Robert Hyatt wrote:
>
>>finally had time to look at this.  Questions:  (1) do you have the
>>KRPKR.* tablebases?  I can't get my program to consider anything but
>>Ka4 here...  Although at move 75, b5+ also seems to be ok, based on a
>>search of just that move (+4.76)...
>>
>>wait!  at move 76, Rd5 is a blunder.  And on my machine, I *instantly*
>>get Rd5 is a draw.  So I now assume you don't have KRPKR tablebases?
>>
>>WAIT!  :)  At move 76, with egtb=0, it also sees this is a draw.
>>
>>Do you by any chance have KRP KR databases, and if so, do the sizes
>>match these:
>>
>>-rw-r--r--   1 hyatt    chess    536870912 Apr 28 11:02 KRPKR.tbb
>>-rw-r--r--   1 hyatt    chess    536870912 Apr 28 11:02 KRPKR.tbw
>>
>>If not, do they match these:
>>
>>-rw-rw-r--   1 hyatt    30       111633299 Oct 16  1997 KRPKR.tbb.gz
>>-rw-rw-r--   1 hyatt    30       74903494 Oct 16  1997 KRPKR.tbw.gz
>>
>>If they match the latter, you forgot to unzip them.  They are useless
>>in that compressed state.  They must be 536,870,912 bytes long, or you
>>are dead...
>>
>>Let me know what is going on here..
>>
>>Note that if you download databases, since they are xxx.yyy.zzz filename,
>>some versions of IE and netscape will drop the .zzz for you without saying
>>anything. leaving you with totally ruined databases...



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