Author: Uri Blass
Date: 13:57:11 01/06/03
Go up one level in this thread
On January 06, 2003 at 14:32:18, Uri Blass wrote: >On January 06, 2003 at 14:15:00, Chris wrote: > >>On January 06, 2003 at 14:06:54, Uri Blass wrote: >> >>>On January 06, 2003 at 12:45:28, Chris wrote: >>> >>>>Some people here seems to doubt that it is possible to beat the top engines, but >>>>I found out that you can still do it with the normal means of setting up the >>>>Stonewall as White. >>>> >>>>These games was of course played without takeback or other kinds of cheating. >>>> >>>>My OTB ELO is 2230 and I have studied computer weaknesses a lot. >>>> >>>>After this game, I lost six in a row, and I decided that maybe I need some more >>>>time the next time I challenge Fritz :-) I believe I would have a better chance >>>>at tournament speed. >>> >>>I believe that at tournament speed Fritz8 also can play better. >>>It is possible that it will not let you to win by the same strategy and the only >>>way to know is to try. >>> >>>It is a mistake to get a conclusion from speed chess about tournament time >>>control games. >>> >>>Uri >> >> >> >>I believe Fritz would be stronger tactically in a longer game, but I don't think >>it would change so much strategically. I was getting into this position by >>following its book. > > >If the book has no errors then the question is simply if Fritz does the same >mistakes if you give it some minutes to calculate. > >I do not know what is the point when Fritz8 starts to show negative evaluation. > >analyzing with yace and going backward so yace can learn shows that yace see a >clear advantage for white after 31...hxg6(1.84 pawns) > >Yace learned the following line >31...hxg6 32.fxg6 Rff8 33.Ng3 f5 34.Nxf5 Qe6 35.Qg5 Kg8 36.Qh5 Rxf5 37.Bxf5 >Qxe3+ 38.Kc2 Qxg1 39.Qh7+ Kf8 40.Qh8+ Ke7 41.Qxg7+ Kd6 > +- (1.84) > > >Yace does not like 31...hxg6 after learning the line and I have the following >analysis > >[D]4r2k/p3qrpp/2b2pP1/3p1P1N/2pP1Q1P/2P1P3/P1BK4/6R1 b - - 0 1 > > > >Analysis > >31...Rff8 32.gxh7 Rf7 33.Qg3 Kxh7 34.Nf4 Kg8 35.h5 Qc7 36.h6 Rfe7 37.Ng6 Rd7 >38.Qxc7 > = (-0.23) Depth: 13 00:01:32 33598kN >31...Rff8 32.gxh7 Rf7 33.Qg3 Kxh7 34.Nf4 Kg8 35.h5 Kh7 36.Ne6 Kh8 37.Qg6 Bd7 >38.h6 Bxe6 > = (0.11) Depth: 14 00:04:29 94591kN >31...Rff8 32.gxh7 Rf7 33.Qg3 Kxh7 34.Nf4 Qd7 35.Ne6 Kh8 36.h5 Qe7 37.Qg6 Bd7 >38.h6 > = (0.11) Depth: 15 00:16:59 324004kN > >(blass, tel-aviv 06.01.2003) > >Uri Yace needs a long analysis to see that 31...Rff8 is also bad The score continues to drop and I stopped it before waiting until it finish iteration 17. ² (0.48) Depth: 16 00:45:34 895399kN 31...Rff8 32.gxh7 Rf7 33.Qg3 Kxh7 34.Nf4 Rb8 35.Qf3 Qd6 36.Qh5+ Kg8 37.Rg2 Be8 38.Ng6 Rfb7 39.Qh8+ Kf7 40.Ne5+ Ke7 41.Rxg7+ Kd8 42.Rg8 Rb2 43.Rxe8+ Kc7 ± (0.88) Depth: 17 01:41:40 2047157kN 31...Rff8 32.gxh7 Rf7 33.Qg3 ± (0.88) Depth: 17 02:32:48 3034226kN (blass, tel-aviv 07.01.2003) I can add that yace suggests 30...Rg8 after all this learning so it can reply g6 by h6. After 30...Rg8 it can see 31.gxf6 as the best move. There are 2 questions here 1)Is it correct to assume that 30...Rg8 is better and 30...Rf7 was the losing move? 2)How much time do programs need to avoid 30...Rf7? Uri
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