Author: James Robertson
Date: 15:59:20 08/22/99
Go up one level in this thread
On August 22, 1999 at 13:21:56, Robert Hyatt wrote: >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... Rad1 is the move my program likes too. James
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