Author: Jeremiah Penery
Date: 22:49:30 01/12/00
Go up one level in this thread
On January 12, 2000 at 18:45:55, Vincent Diepeveen wrote: >On January 12, 2000 at 18:27:23, Albert Silver wrote: > >>On January 12, 2000 at 16:11:31, Bruce Moreland wrote: >> >>> DT Ferret Chop Dark Thought >>> 4x450 500 500mhz 21264 >>> -------- -------- -------- ------------ >>>1 6:00:00 1:56:54 0:12:25 >>>2 0:02:00 0:00:33 >>>3 >>>4 2:30:00 0:25:46 >>>5 2:00:00 >>>6 >>>7 6:00:00 1:27:00 >>>8 1:30:46 >>>9 >>>10 0:02:00 0:00:29 0:50:00 >>>11 0:05:00 0:00:13 0:12:00 0:04:32 >>> >>>I looked at Shep's site, which includes results mainly on slow hardware (P6/200 >>>or 233). >>> >>>http://sccs.8m.com/nolot.html >>> >>>Many programs find #1 in under 20 minutes. >>> >>>CM5555 finds #2 in something under six hours. >>> >>>Rebel 10 found #10 in a couple minutes. >>> >>>Mine finds #2 quickly due to extension successes. I'm surprised it found #8 at >>>all, the score though was only +0.75. >>> >>>I will include more information as it becomes available. I'll run #5 for a day >>>or two. >> >>Just a question: is it sure they are all 100% correct? I never checked this >>myself, but I recall someone (in fact I think it was you) mentioning in RGCC >>some time back that Nolot wasn't absolutely sure about all of them. > >The axb5 sacrafice is more a longterm sacrafice, which i don't see, >but the idea for black is to blow up the center which is possible if the >queen of white is at the other side of the board (a8). > >the Nxg5 instead of bxg5 move is very difficult but i don't doubt it >wins in the end, i lack just several tenths of positional eval when searching >quite deep for DIEP to play it. All other moves i could verify to be correct, >though from Ng5 it's a big mystery to me what line(s) DIEP needs to find in >order to see it. > >The second problem (Rxc5) is really mating extensions dependant. I've had >versions of DIEP which extended quite a bit threats which failed high >within seconds at 7 ply. Later it needed 8 ply to find it, and that >continuesly was a ply more till it needed 10 ply. Then i turned >off the threat extension, plan to turn it on real soon and test >again at NOLOT. What do you think of #9, Ng5? Here is the original analysis: 1.Ng5!! hxg5 2.hxg5! Rac8 3.Nf6!! Nb8 (3...gxf6 4.gxf6 Rfe8 5.Qh5 Kg8 6.Rxc5! Bg6! 7.Qh4 Bxc5 8.Be4 Ne7 9.Kg2 Qd5 10.Bxd5+-) 4.Qh5 Bxf6 5.gxf6 gxf6 6.Rxc5 Rxc5 7.Be4 f5 8.Kg2 Rg8 9.Rh1 Rg7 10.Bh6 Nd7 11.Bxg7+ Kxg7 12.Qxh7+ 1-0 Is it certain that all these moves are optimal? I don't really see any computer being able to find this one...
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