Author: Robert Hyatt
Date: 18:25:30 05/23/01
Go up one level in this thread
On May 23, 2001 at 18:50:48, Uri Blass wrote: >On May 23, 2001 at 18:31:20, Robert Hyatt wrote: > >>On May 23, 2001 at 15:48:27, Uri Blass wrote: >> >>>On May 23, 2001 at 13:46:30, Robert Hyatt wrote: >>> >>>>On May 23, 2001 at 11:55:29, Bruce Moreland wrote: >>>> >>>>>On May 22, 2001 at 13:07:29, Robert Hyatt wrote: >>>>> >>>>>>Rh5 seems better although I couldn't get DB Jr's score of +1.5 in any reasonable >>>>>>time (two hours or so). >>>>>> >>>>>>I guess this leads to Uri's question (again) of "does Bxg7 actually win or >>>>>>not?" >>>>> >>>>>My program liked Bxg7 in a minute or two, with a score of around +1, but it is >>>>>speculative. >>>>> >>>>>It has not been tuned for this position. It had Bg7 Kg7 Ne5 and I don't >>>>>remember what all after that. >>>>> >>>>>I went out for a while and when I came back it had Rh5 with a fail-high. This >>>>>morning it is at +1.24, same thing. >>>>> >>>>>I'll leave it running for a day or two and see what happens. >>>>> >>>>>bruce >>>> >>>> >>>>It seems obvious that all the programs like Rh5. The worry is that this is >>>>a possibly bad move on a deep enough search, although I don't believe this >>>>myself (yet). >>>> >>>>Kasparov seems to think that Bg7 is best. But when he says 'best' I am not >>>>sure what that means, exactly. IE 'forced win'? 'good prospects'? Etc. And >>>>of course he _could_ easily be wrong, although I would tend to not think this >>>>is the normal case... >>>> >>>>Your 1.24 is getting closer to DB Jr's score than mine reached, although I >>>>didn't let it run overnight. Think I will crank it up and let it burn for >>>>a while myself... >>> >>>Interesting also to know how much time per position does Crafty need to get 11 >>>out of 13(I say 11 out of 13 and not out of 14 because it seems that the Bxg7 is >>>not correct so I do not count this position as a good test suite unless the >>>solution is Rh5). >> >>I will try to crank it up and let it run. I could start at 1 hour per position, >>and then for the ones it misses, go to 4 or 8 to see what happens. No idea >>how hard this will be to do as I start at 6 after 20 minutes and there is a long >>way to go to reach 11. >> >> >> >>> >>>I believe that Deep Fritz on slower hardware can get something like 7 or 8 out >>>of 13 on PIII450(20 minutes per position). >>> >>>It could solve 1-5,7,8 but I did not give it enough time to find if it is going >>>to change it's mind in all of these cases. >>> >>>It could also find the right move in 9 but changed it's mind and it seem to fail >>>to solve it because of null move problems. >>> >>>It changed it's mind after more than 20 minutes on PIII450 so I may consider it >>>as solved on pIII450(20 minutes per position) ><snipped> >>Note that the original test was for 15 minutes per position if my instructions >>were correct... > >Yes but I used slow hardware that is only PIII450 and even 30 minutes per >position is slower than 15 minutes per position on your hardware. > >I also remember that the 11 out of 14 for deep blue Junior was based on 20 >minutes per position. > >Uri Don't forget that DB Jr is about 1/32 the speed of DB Sr. :) that 20 minute time will probably drop to under 1 minute...
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