Author: Robert Hyatt
Date: 10:21:56 08/22/99
Go up one level in this thread
On August 21, 1999 at 10:56:20, blass uri wrote: > >On August 21, 1999 at 10:34:05, odell hall wrote: > >>On August 21, 1999 at 09:20:34, blass uri wrote: >> >>> >>>On August 21, 1999 at 08:10:55, odell hall wrote: >>> >>>>On August 21, 1999 at 08:04:43, odell hall wrote: >>>> >>>>>On August 21, 1999 at 06:43:55, blass uri wrote: >>>>> >>>>>> >>>>>>On August 21, 1999 at 05:08:58, odell hall wrote: >>>>>> >>>>>>>Hi >>>>>>> >>>>>>> >>>>>>> So far only Fritz5.32 can solve this position, I am not letting my programs >>>>>>>think more than five minutes. Fritz 5.32 AMD-k2II 350 45mb for fritz solves in >>>>>>>47sec!!! >>>>>>> >>>>>>>2n1r1k1/2p1q2p/3pN1p1/3Pp1N1/3bP3/5Q2/2r3PP/R4R1K w - - id Bart - Towerking; bm >>>>>>>g5h7; >>>>>> >>>>>>I think that there are many solutions to the problem and g5h7 is not the only >>>>>>winning move so it is not a good problem. >>>>> >>>>> >>>>> >>>>>Ok uri come on icc and i will beat any program you have with Nxh7 just to prove >>>>>that it is the winning move. The next best move is Ra3 which is slightly >>>>>inferior. But nxh7!! is definetely the best move! without question. >>>>>> >>>>>>Can Fritz5.32 defend this position with black against the program that do not >>>>>>find g5h7? >>>>>> >>>>>>Uri >>>> >>>> >>>>I am defining the Best move as the move which leads to the greatest loss of >>>>material for the opposing side. Just because fritz can not defend the position >>>>against a program that does not play nxh7 does mean that Nxh7 is not the best >>>>move. Maybe you can explain your logic to me. No one said that there was not >>>>many good moves in the position, only that Nxh7 is that best. >>> >>>My logic is that if there is more than 1 winning move then it is not a good >>>problem. >>> >>>My version of Junior after some hours want to play Rab1 with 2.49 pawns >>>advantage for white(1.Rab1 h5 2.Qf7+ Qxf7 3.Rxf7 Rf2 4.Rxc7 Bb6 5.Rg7+ Kh8 >>>6.Nf7+ Rxf7 7.Rxf7... is the main line) >>> >>>Uri >> >> >>I bet if you feed Nxh7 into junior and then let it think, it will see that this >>move is stronger > >I am not sure about it. > >I gave it more than 10 minutes for the position after Nxh7 and the evaluation >was only 1.74 pawns for white. > >I can prove by a tree that the evaluation is bigger than 3 pawns but the same >may hold for Rab1. > >I agree that >1.Nxh7 Kxh7 2.Ra3 Rf2 3.Rxf2 Bxf2 4.Qxf2 Nb6 5.Rh3+ Kg8 6.Rh6 >is winning for white and that black has no good alternative. > >I gave the initial position to my Fritz5 engine and with 64M hash tables it >found Nxh7 at depth 11 only to go back to Rab1 at depth 12 and with 128M hash it >did not find Nxh7 and prefered Rab1 at depth 11 and 12. > >I have not Fritz5.32 but maybe it can also change its mind to Rab1 if it get >more time or more hash tables. > >Uri Also Rad1 seems strong. Crafty gets way over +2 with this move as well...
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