Author: Howard Exner
Date: 00:10:32 01/30/00
Go up one level in this thread
On January 30, 2000 at 02:32:37, blass uri wrote: >On January 30, 2000 at 02:18:43, blass uri wrote: > >>On January 29, 2000 at 23:11:47, blass uri wrote: >> >>>On January 29, 2000 at 17:01:45, Dan Andersson wrote: >>> >>>>Im certain he does not mean a forced win, as in a short variation. But black has >>>>a very difficult position, do not doubt that. And ss=10 is that 5 moves w. >>>>extensions? If so, the cm should have big trouble defending the position. Btw h6 >>>>weakens blacks position considerably. >>>> >>>>Regards Dan Andersson >>> >>>I do not think that h6 weakens blacks position considerably. >>>The opposite. >>>it prepares Bg5 for the future. >>> >>>I believe that Rxf7 is the best move after h6 otherwise chessmaster could >>>probably find something better than Rxf7. >>> >>>chessmaster is very strong at tactics in this position and if there was >>>something for white it could probably find it. >>> >>>I guess that ss=10 is more than 5 moves extension. >>>chessmaster can find evaluation of more than 4 pawns advanatge for white for >>>black's move Qe8 in 10-15 minutes of search and I believe that you need more >>>than 10 moves of extension to do it. >>> >>>chessmaster found h6 after 4-5 hours so if there is a tactical combination for >>>white it must be more than 3 plies deeper than Rf6. >>> >>>Uri >> >>I found that 20...h6 instead of Qe8(and not only 20...a4 Rf3 h6) is not losing >>more than a pawn. >> >>chessmaster finds nothing better than Rf6 Kh7 Rxf7 >> >>I suspect that there are other reasonable moves for black(for example >>chessmaster could not find a win for white after Qc8 in the first few minutes) >>Uri > >I see it needs more than 20 minutes to see that Rf6 wins against Qc8 at depth >2/12 (after the game move it needed less than 3 minutes to see that Rf6 is >winning at depth 1/11) > >Uri This is turning out to be a fascinating position for computers to play over. Does any computer play 20. ... a4 in say less than ten minutes? How would computers continue after a line like the following: 20. Qh5 a4 21. h3 axb3 22. axb3 Here white is planning to play actively with the rooks while tucking the king away to h2 if necessary.
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