Author: Gordon Rattray
Date: 03:04:29 10/06/04
Go up one level in this thread
On October 06, 2004 at 04:04:40, Uri Blass wrote: >On October 06, 2004 at 03:38:08, martin fierz wrote: > >>On October 05, 2004 at 23:42:12, Albert Silver wrote: >> >>>On October 05, 2004 at 19:59:48, Gordon Rattray wrote: >>> >>>>I've noticed that Shredder 8 and Deep Fritz 8 don't stick with e5, and switch to >>>>Nf5. The last iteration of each search was allowed to complete in case e5 was >>>>chosen again. >>>> >>>>cheers >>>> >>>>Gordon >>>> >>>>--------------------- >>>> >>>>Hardware: Dual Opteron 248, 1 GB for hash >>>> >>>>Analysis by Shredder 8: >>>> >>>>1.Bxb4 Rxb4 2.Rf4 >>>> -+ (-1.77) Depth: 1/2 00:00:01 >>>>1.Bxb4 Rb6 2.Nc2 Qb2 3.Bc3 >>>> µ (-1.08) Depth: 1/3 00:00:01 >>>>1.Bxb4 Rb6 2.Nc2 Qb2 3.Bc3 >>>> +- (2.20) Depth: 2/2 00:00:01 >>> >>>(...) >>> >>>>1.Nf5 Ra7 2.Nh6+ Kg7 3.Nf5+ Kf8 4.Rxb3 axb3 5.Bxb4 Rxb4 6.Nxd6 Ra2 7.Qf1 Rb2 >>>>8.c5 Qxb1 9.e5 Rxh4 10.Qxb1 Rxb1# >>>> -+ (-3.60) Depth: 21/60 00:58:29 3388524kN >>> >>>One must wonder about a line where the program suggests a move that leads to >>>itself getting mated in its main line. Especially when the mate isn't forced. >>>:-) >>> >>> Albert >> >>..and especially when it evaluates the mate as -3.60 :-) >> >>cheers >> martin > >It only proves that chess programs has a lot to improve if even the best program >evaluates mate as -3.60. > >Movei never evaluates mate as -3.60 but unfortunately it has other weaknesses. > >Uri Ok, so we’ve once again highlighted that Shredder 8 can have issues while constructing its PV, maybe as a side effect of an optimisation… no news here :-) How about the “minor” detail that neither Shredder or Fritz stick with e5 when given an hour or so to analyse… isn’t this more relevant to this thread… oh well… :-) Gordon
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