Author: Robert Hyatt
Date: 17:00:23 10/22/02
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On October 22, 2002 at 18:51:19, Slater Wold wrote: >On October 22, 2002 at 18:35:25, Dann Corbit wrote: > >>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. > >I've seen both last forever. But the time always updates. Remember, this is >almost 1,000 minutes later. Still it had not updated. I have not seen any infinite loops, but it can happen. If you are running in console mode, type a "." (period) and it should give you a brief status of which moves are being searched ply by ply and so forth. If that doesn't respond, then something is definitely wrong. If it does, it might still be hung, so do it multiple times look at the things like 4: 20/41 that means at ply 4, it has searched 20 of 41 moves. If _none_ are changing, then something is hosed... if some are changing, it is making progress... > >>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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