Author: Uri Blass
Date: 21:55:15 03/05/02
Go up one level in this thread
On March 05, 2002 at 23:19:39, Terry McCracken wrote: >On March 05, 2002 at 15:27:58, Dann Corbit wrote: > >>On March 05, 2002 at 13:35:06, Uri Blass wrote: >> >>>On March 05, 2002 at 11:43:35, Dann Corbit wrote: >>> >>>>On March 04, 2002 at 17:43:29, Albert Silver wrote: >>>> >>>>>The following position occurred in Spassky-Beliavsky, Reykjavik, 1988 >>>>> >>>>>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!? >>> >>> >>>This defence was discussed by albert silver and by me >>> >>>25.Nxg6 hxg6 26.Qh6 Be6 27.Rd3 f5 >>>28.Rg3 Rf6 29.Rh3 Kf7 30.Qh7+ Kf8 31.exf5 Bxb3 32.axb3 >>>seems to be decisive for white >>> >>>Yace proved 1.20 pawns for white in the root position for Nxg6 based on some >>>analysis that is based mainly on this line. >> >>The two lines (first the yace line, then the crafty 1 hr analysis:) >>W B W B W B W >>Nxg6 hxg6 Qh6 Be6 Rd3 f5 Rg3 Rf6 Rh3 Kf7 Qh7+ Kf8 exf5 Bxb3 axb3 c0 "seems to >>be decisive for white"; >>Nxg6 hxg6 Qh6 Be6 Rd3 f5 Rh3 Kf7 Qh7+ Kf6 Qh4+ Kg7 Bxe6 Qxe6 exf5 Qg8 Qh6+ Kf6 >>fxg6 Ke6 Rd3 Qh8 Qd2 Kf6 >> >>Agree out to Rg3 verses Rh3. So I went to Rg3 and analyzed what would happen >>there: >>[D]4qrk1/8/pBn1b1pQ/1p2pp2/4P3/bBP3R1/P4PPP/6K1 b - - acd 14; acn 546692901; acs >>1001; c0 "after Nxg6 hxg6 Qh6 Be6 Rd3 f5 Rg3"; ce 82; pv Rf6 Rh3 Kf7 Bd5 Ke7 c4 >>Bb4 Qg7+ Qf7 Qh8 Qf8 Bxc6 Qxh8 Rxh8 Bxc4; >> >>I remain unconvinced that this line is better. > >Really? Without the use of a computer and bieng a bit of a tactician, and >looking over the evidence by computers as well, I feel confident Nxg6!! is >without a doubt the strongest continuation. > >I'm confident I could win with White after the tactical shot Nxg6!! against >anyone!:o) > >Terry I only feel sure that Nxg6 is a clear advantage for white but I do not feel sure that white has no alternative good move. Nxg6 seems to be the best move based on computer's analysis because it wins at least a pawn. I do not feel sure that I could win the game after Nxg6 against the best defence because being a pawn up is not enough to win and you need also to play well later(there are cases when even playing well later does not help against the best defence). Uri
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