Author: John J. J. Smith
Date: 17:08:29 05/28/05
Go up one level in this thread
On May 27, 2005 at 18:19:42, F. Huber wrote: >On May 27, 2005 at 17:56:34, Uri Blass wrote: > >>On May 27, 2005 at 16:57:35, F. Huber wrote: >> >>>On May 27, 2005 at 16:53:49, Rob Basham wrote: >>> >>>>Well, at least on this move...:-) >>>> >>>>Mate in 10.... >>>> >>>>[D]4r1k1/rp2Bppp/p1b5/1q2Q3/R7/1P5P/P4PP1/3R2K1 w - - 0 1 >>>> >>>> >>>>Both the Risc (dedicated unit) and Fritz 8 on PC find Qxg7+ >>>>in just 9 seconds! >>>> >>>>P3-850 >>>> >>>>Rob >>> >>>Well, and ChestUCI finds it in less than 1 sec on my slow Celeron/400! :-) >>> >>>Regards, >>>Franz. >> >>But ChestUCI *default setting* needs 50 minutes to find it on A3000 >> >>New game, 10'/40+10'/40+10'/40 >>4r1k1/rp2Bppp/p1b5/1q2Q3/R7/1P5P/P4PP1/3R2K1 w - - 0 1 >> >>Analysis by ChestUCI Ver.3.7: >> >>1.Qxg7+ >> +- (#10) Depth: 10 00:50:05 1081113kN >> >>(, 28.05.2005) >> >>It proves that there is no mate in 9 in the process. >> >>Uri > >There are 3 important points to mention: > >1) Do you really think, that it is fair to compare ChestUCI´s default settings >(where it _proves_ the shortest mate with a brute-force search) with a normal >chess engine, which does all kinds of search extensions, cutoffs, ... ? >Or is it really so hard to switch _one_ option to Automatic-mode? > >2) And as I can see from your output, you´re still using a _very_ old version >of ChestUCI, which doesn´t even have the new ´ThreatDepth´ feature - >and exactly _this_ function speeds up its search dramatcally! > >3) When comparing the solution times with normal chess engines (like this >dedicated RISC unit or Fritz 8) it´s not necessary at all to _prove_ that >there is no mate in 9, simply because NO engine actually _proves_ this, when >looking for a mate - so why requiring such a prove from ChestUCI? > >Franz. Franz Can you please explain exactly which options you set to get such a fast solution? Do you always use autoamtic mode? What about Autoturbo mode? Thanks. John
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