Author: Andreas Stabel
Date: 06:33:32 01/18/00
Go up one level in this thread
On January 18, 2000 at 09:24:18, Robert Hyatt wrote: >On January 18, 2000 at 08:36:58, Vincent Diepeveen wrote: > >>On January 18, 2000 at 07:16:01, blass uri wrote: >> >>>On January 18, 2000 at 06:27:06, Vincent Diepeveen wrote: >>> >>>>On January 17, 2000 at 16:08:04, Jeremiah Penery wrote: >>>> >>>>>On January 17, 2000 at 14:39:35, Vincent Diepeveen wrote: >>>>> >>>>>>On January 17, 2000 at 14:32:28, Dann Corbit wrote: >>>>>> >>>>>>>I see that there are programs that can solve NOLOT #8. >>>>>> >>>>>>Ferret. >>>>>> >>>>>>>I also understand that that position was shown to be in error. >>>>>> >>>>>>No that's a big lie. >>>>> >>>>>What are you talking about?? >>>>>The given analysis _was_ in error. 3. ...gxf6 is not the best move, as you even >>>>>pointed out. >>>> >>>>gxf6 is THE PROBLEM to see for programs. >>>>if a program doesn't need to consider gxf6 then it finds at say 7 ply >>>>or something the Bxh7 move. >>> >>>It depends on the evaluation function of the program. >>>I think that I read that deep thought saw that the line with gxf6 is losing but >>>prefered not to play Bxh7 but play another move with the idea to play Bxh7 in >>>the next move >> >>that is highly unlikely. what we need is: >> - search output of deep thought in root >> - search output of deep thought after bxh7 kxh7 qh5 kg8 rd4 bf3 >> >>If the last output is better for white at 6 ply for deep thought than >>the root score then we can talk further. >> >> >> >>>Uri > > >I believe Bruce posted this already, some while back. And either Hsu or >Campbell mentioned the same thing. Nothing said they were correct, but that >the move they suggested (actually the mov DT suggested) might be better because >it eliminated one tactical resource that made it harder to find. I've been digging in some old directories and have come up with the following: 8 ;r3;r;b;k1/;p;p;q2;p;p;p/2;b1;pb2/8/6q1/1p1b3p/p1p2pp1/r2r2k1/40 White to move 8 R * - * R B K * 7 P P Q - * P P P 6 - * B * P b - * 5 * - * - * - * - 4 - * - * - * q * 3 * p * b * - * p 2 p * p * - p p * 1 r - * r * - k - a b c d e f g h Source: Gufeld-Osnos, USSR 1978. The move played was 1. Bh7, but as it turns out 1. Bh7 might not be the best move. Osnos defended poorly and got slaughtered. With best black defence, white only maintains a positional edge after 1. Bh7 Kh7 2. Qh5 Kg8 3. Rd4 Bf3! (with the idea of Qxc2, and then Q to king side to defend the king). DT-2 prefers to play c4, which threatens Bh7 for real. Regards Andreas Stabel
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