Author: Paul
Date: 08:18:46 10/28/01
Go up one level in this thread
On October 28, 2001 at 10:25:51, leonid wrote: >On October 28, 2001 at 08:37:47, Paul wrote: > >>On October 28, 2001 at 07:29:06, leonid wrote: >> >>>On October 27, 2001 at 17:36:53, leonid wrote: >>> >>>>On October 27, 2001 at 16:52:40, Paul wrote: >>>> >>>>>On October 27, 2001 at 13:06:43, leonid wrote: >>>>> >>>>>>Hello! >>>>>> >>>>>>I think that the next mate is just in the middle. It is not very hard to solve >>>>>>and still it is not extremely easy. The best one when you want to be a sure >>>>>>winner but not at big price. >>>>>> >>>>>>[D]bBQQ1nrq/b2NNq1k/K6n/QQqq1q1B/3Q1Q2/3r1qR1/3q2q1/3RQQq1 w - - >>>>>> >>>>>>Please indicate your result. >>>>>> >>>>>>Thanks, >>>>>>Leonid. >>>>> >>>>>Hi Leonid, >>> >>>Hi, Paul, >>> >>>>>since Pretz is in the garage at the moment for a revision of the engine, I >>>>>thought I'd go over and comfort her with your new position. But I think the >>>>>engineer broke something, because it doesn't find a mate (in 12) very quick: >>> >>>This position is mate in 12. Verified it at night by searching 11 moves by brute >>>force. Took slightly more time that expected, since branching factor jumped >>>after 10 moves. Three hours and 45 min. 12 was found already by selective. >>> >>>Cheers, >>>Leonid. >> >>Ok, so a mate in 12 it is! I only checked until depth 9 with Chest and estimated >>it would take about an hour to prove that there is no mate in 11, so I stopped. >> >>I haven't been able to come up with a faster time ... almost 8 minutes for mine >>to find the mate in 12. > >The most important is that your program find mate in 12. This signify that there >is no bug. Some time selective will not reach minimal depth and sometime it do. >At least, it is what I could see with mine. It found in few positions mate in >much higher level that other programs, including your. That's because you search more selective than I do ... from what I understand from your program, if you would search more moves than just checks, you also would find shorter mates ... you could try? >If you will have some free time, try this position on some other good program >that search well with selective. Say me what time you found. I have only Mate >2.0 inside of Hiarcs but this engin do brute force only. I have no other programs installed on my comps anymore, just Pretz & Chest, so can't try anything, sorry! I'm also curious how fast other programs found this mate in 12, to see where I am with my Pretz ... >Your result in today position is excellent! You found minimal depth with >selective. I did the same and at almost identical time with you. Mine is 2.8 >sec. > >Cheers, >Leonid. Groetjes, Paul
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