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Subject: Re: Problems with Crafty 19.0

Author: Dann Corbit

Date: 15:35:25 10/22/02

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On October 22, 2002 at 18:28:15, Slater Wold wrote:

>I have tried to analyze the same position twice now with Crafty 19.0.  Both time
>it has locked, both in the same place.  Coincedence?  Or a bug?
>
>I am using the exe from Hyatt's FTP site.  This output is from the screen:

[snip]

>               20   109:00  -2.61   1. d8=Q Nf7+ 2. Ke7 Nxd8 3. Kxd8 Ba5+
>                                    4. Kd7 Bc7 5. Nxe3 Bxg3 6. Kc6 Bf2
>                                    7. Nd5 Bd4 8. Kb7 Nb4 9. Nxb4 cxb4
>                                    10. Bc2+ Kg7 11. Kc6 h5 12. Kd6 (s=7)
>               20   163:45   5/19*  1. Nxe3
>
>
>
>This is after about 18.5 hours of running.  The time is not updating, although
>Windows still reports 100% usage of the CPUs.

Two distinct possibilities:

I have seen two effects that both look like that...
If you get a fail high or fail low at that point, it might take a very, very
long time to resolve.

Another thing that has happened is that the timer wraps.  However, when that
happens (usually on very long analysis of several days) you will see a nonesense
number in the time like

               20   991834234163:45   5/19*  1. Nxe3

That problem is obviously going to be very hard to reproduce.



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