Author: Ed Schröder
Date: 03:36:58 03/05/02
Go up one level in this thread
On March 05, 2002 at 05:15:38, Uri Blass wrote: >Yace also likes f5 and has Rh3 in the main line so it seems that finding a >better move than Rh3 is not easy. > >The question is if Rh3 is winning. I don't know, a further investigation is needed IMO. Rebel gives a +2.30 score for Rh3 after 15 plies but probably most of that is coming from eval. 00:00:01.5 1,34 7 416116 Rh3 Kf7 exf5 Bxb3 Qxg6+ Ke7 Rh7+ Rf7 00:00:02.5 1,34 8 948561 Rh3 Kf7 exf5 Bxb3 Qxg6+ Ke7 Rh7+ Rf7 00:00:04.9 1,34 9 2379413 Rh3 Kf7 exf5 Bxb3 Qxg6+ Ke7 Rh7+ Rf7 00:00:08.7 2,22 10 5564762 Rh3 Kf7 exf5 Bxb3 Qxg6+ Ke7 Rh7+ Rf7 00:00:16.6 2,10 11 12107255 Rh3 Kf7 exf5 Bxb3 Qxg6+ Ke7 Qg5+ Rf6 00:00:42.6 1,78 12 31920754 Rh3 Kf7 Qh7+ Kf6 Qh4+ Kg7 Bxe6 Qxe6 00:02:02.0 1,62 13 95158047 Rh3 Kf7 Qh7+ Kf6 Qh4+ Kf7 exf5 Bxb3 00:06:49.0 2,30 14 322198950 Rh3 Kf7 Qh7+ Kf6 Qh4+ Kg7 Bxe6 00:14:38.6 2,30 15 688286326 Rh3 Kf7 Qh7+ Kf6 Qh4+ Kg7 Qh7+ Kf6 >If Rh3 is not winning then it means that Rebel found the right move for the >wrong reasons That's a popular statement in this forum, I once had similar thoughts but changed my mind. It does not matter if Nxg6! is played by eval or search, the only thing that matters is playing the good move. >and the question in this case is if Rebel can practically find the >winning move in the following position(I did not investigate to find the right >move): > >[D]4qrk1/8/pBn1b1pQ/1p2pp2/4P3/bBPR4/P4PPP/6K1 w - f6 0 4 > > >Here is yace main line before f7-f5 > >Analysis by Yace 0.99.56: > > >3...f5 4.Rh3 Kf7 5.exf5 Bxb3 6.fxg6+ Ke7 7.axb3 Rf6 8.Qh7+ Ke6 9.g7 Ne7 10.Rd3 >Qg6 11.Qh3+ Nf5 12.Bd8 > ² (0.26) Depth: 12 00:10:16 199936kN [d]4qrk1/8/pBn1b1pQ/1p2pp2/4P3/bBP4R/P4PPP/6K1 b - - 0 1 Following Rebel's analysis 1. Rh3 Kf7 2. Qh7+ Kf6 3. Qh4+ Kg7 4. Bxe6 Qxe6 5. exf5 Qxf5 6. Qh6+ Kf7 7. Rf3 Qxf3 8. gxf3 1-0 or... 1. Rh3 Kf7 2. Qh7+ Kf6 3. Qh4+ Kg7 4. Bxe6 Qxe6 5. exf5 Qxa2 6. Qh7+ Kf6 7. Qxg6+ Ke7 8. Rh7+ Rf7 9. Rxf7+ Qxf7 10. Qxc6 Qxf5 White is a healthy pawn up while the black king is draughty, Rebel's score still over 2 pawns, +2.39 to be exactly. Ed >(Blass, Tel-aviv 05.03.2002) > > >Uri
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