Author: Uri Blass
Date: 02:15:38 03/05/02
Go up one level in this thread
On March 05, 2002 at 05:01:39, Ed Schröder wrote: >On March 04, 2002 at 21:17:41, Albert Silver wrote: > >>On March 04, 2002 at 18:16:12, Ed Schröder wrote: >> >>>On March 04, 2002 at 17:43:29, Albert Silver wrote: >>> >>>>The following position occurred in Spassky-Beliavsky, Reykjavik, 1988 >>>> >>>>[D]2b1qrk1/5p1p/pBn3p1/1p2p3/4P2N/bBP1Q3/P4PPP/3R2K1 w - - >>>> >>>>Spassky found a tremendous move 25.Nxg6!! and won the game. I don't think any >>>>engines will have much luck with it but feel free to try it. I've analyzed it in >>>>detail and can verify that it is the strongest move and correct, so as a further >>>>challenge, see if you can find the *strongest* continuation after the possible >>>>defense: 25...hxg6 26.Qh6 Be6!? >>>> >>>> Albert >>> >>> >>>It's dangerous to make such strong statements :-) >>> >>>Rebel Century 4 [WB] -> 18 seconds. >>> >>>Ed >> >>Fantastic result, Ed! As Slater pointed out (saving me face just a tad :-) ) > >I expected a more humble statement :-)) > > >>other engines aren't quite as successful. The defensive move Bc1 is interesting >>too, and the only move I had analyzed was f5. In a sense Bc1 is possibly the >>most efficient defense as it doesn't allow the mega (losing) complications that >>ensue after f5. > >The Bc1! defense is so typical for computers, if there is one little small hole >in the giant chess tree of the millions of positions, computers will find it as >in this case. It's what it makes it so hard for a human to beat the beast. As in >the 2 games van Wely won, he was not able to decide the game in the king attack >and was forced to go to the ending. > > >>It's a position that's great fun to analyze oneself (if you have >>the courage) which is why I threw down the gauntlet that way. BTW, > > >>Rh3 isn't the >>strongest follow-up to f5. ;-) > >Always something to complain huh? > >:) > >Ed 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. If Rh3 is not winning then it means that Rebel found the right move for the wrong reasons 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 (Blass, Tel-aviv 05.03.2002) Uri
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