Author: Terry McCracken
Date: 20:35:08 02/09/06
Go up one level in this thread
On February 09, 2006 at 20:04:23, Robin Smith wrote: >On February 09, 2006 at 19:03:23, Terry McCracken wrote: > >>On February 09, 2006 at 17:27:35, Uri Blass wrote: >> >>>On February 09, 2006 at 13:00:39, Andreas St. wrote: >>> >>>>Hi, >>>>yesterday i posted this position: >>>> >>>>2r5/2pR1pk1/p1P3p1/P2K4/5P1p/5P1P/8/8 w - - 0 1 >>>> >>>>and some users said, Rybka finds the solution. >>>> >>>>>Not Rybka 13b, but Rybka 1.0 Beta 32-bit (the first version!!!) >>>>>Best regards, >>>>>Orlando >>>> >>>>>Rybka 1.0 Beta 32-bit, sees Rxc7 quickly. I've no idea how the person testing >>>>>whatever version had this failure. >>>> >>>>>Terry >>>> >>>> >>>>What do you mean??? No Rybka version finds the only winning move Rxc7! >>> >>> >>>Are you sure that it is the only winning move. >>>Do you have a proof that f5 does not win? >> >>1. f5?! wins but isn't as good as the simple Rxc7! > >Hi Terry, > >I believe after 1.f5? that white has thrown away the win. For example: > >1.f5? g5! 2.Rxc7 Rxc7 3.Kd6 Rc8 4.Kd7 Ra8 5.c7 Kf6 6.c8Q Rxc8 7.Kxc8 Kxf5 8.Kb7 >Ke5 9.Kxa6 f5 = > Yes, I never really considered the consequences of f5?? as the move is counterintuitive. White appears to have a draw at best. Terry >What line leads you to believe white can still win after 1.f5? > >-Robin > >> >>Terry >>> >>> >>>>If you analyse long enough, you will see, all Rybka versions prefers f5. >>>>At the latest after one hour no Rxc7, but f5! >>>>And look at the score of rybka. He sees nothing in this position. >>>>Fritz 9 for example has +3.50 after 42sec. >>>>Shredder 9 after 0 sec.! After 17sec. Score +3.05 >>> >>>As Albert silver proved high score proves nothing here and Fritz9's score goes >>>down later. >>> >>>Uri
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