Author: blass uri
Date: 00:29:35 07/29/00
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On July 28, 2000 at 20:22:01, Jeremiah Penery wrote: >On July 28, 2000 at 19:12:55, blass uri wrote: > >>On July 28, 2000 at 18:25:17, blass uri wrote: >><snipped> >>>Fritz5.32 that is not the latest Fritz gives the following evaluation: >>>Qxc6 -1.62 depth 14/30 >>>fail high Qe3 -1.59 depth 14/41 >>>solved fail high with -1.50 score. >> >>I can add that the valuation at depth 16 also failed high and the failed high >>was solved with -0.81 score at depth 15/45 > >I suggest an experiment: Let Fritz continue to search even deeper, say to 20 >plies or more, and then report about what Fritz thinks. If it ever finds the >drawing line, I will (in the style of Dann Corbit :) write a poem in Fritz's >honor, extolling its greatness of search and evaluation. > >I did this experiment with some versions of Crafty and some strange things >happened: It kept failing high on Qe3 until it found a draw-score (at ply 21 or >so), but it was not the real drawing line, so it started failing low again >because it could never find the right line. It eventually failed back to -1.5, >but I was forcing it to search only Qe3, so I couldn't know if it would change >its mind or not. There is no way to know that DB didn't search the Qe3 line >very deeply or not, but I contend that no computer will ever find the draw >because there are quiet moves near the end of the line. There is a way to know because you can search the alternative and see if the score of it is clearly lower than -1.5. I do not think that no computer will find the draw line because it is possible to find it by the right extensions. Uri
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