Author: Marc van Hal
Date: 15:27:29 05/10/03
Go up one level in this thread
On May 10, 2003 at 05:23:13, Drexel,Michael wrote: >On May 10, 2003 at 04:59:30, martin fierz wrote: > >>On May 09, 2003 at 18:23:55, Drexel,Michael wrote: >> >>>On May 09, 2003 at 17:21:07, martin fierz wrote: >> >>>>i'm not so sure that strong chessplayers favour black here. this position ends >>>>in a += in the line given in NCO; >>> >>>This is probably not correct. maybe its old. >> >>NCO is fairly new, and very good in general. i certainly think that it's worth a >>lot more than the result of a game between wildly mismatched players, such as... > >You never can trust such publications. I have quite often discovered holes in >those lines. > >Nunn,J (2590) - Howell,J (2505) [B02] >London Lloyds London (5), 08.1993 > >1.e4 Sf6 2.Sc3 d5 3.e5 Sfd7 4.d4 c5 5.f4 cxd4 6.Sb5 Sc6 7.Sf3 e6 8.Sbxd4 Sxd4 >9.Sxd4 Db6 10.c3 Sb8 11.Le3 Sc6 12.Ld3 Sxd4 13.cxd4 Ld7 14.0-0 g6 15.De2 Le7 >16.Kh1 0-0-0 17.b4 Kb8 18.a4 Dxb4 19.Tfb1 Da5 20.Ld2 Dc7 21.a5 Ka8 22.a6 Tb8 >23.Tc1 Dd8 24.axb7+ Txb7 25.Ta2 Db8 26.h3 Lb5 27.Txa7+ Txa7 28.Lxb5 Ta2 29.Dd3 >Tc8 30.Tb1 Da7 31.Kh2 Ta3 32.Tb3 Txb3 33.Dxb3 Db7 34.Da4+ Kb8 35.La6 Dc6 36.Db3+ >Ka7 37.Lxc8 Dxc8 38.Da4+ Da6 39.De8 Db7 40.Dxf7 La3 41.Dxe6 1-0 > >John Nunn refused to sacrifice his e-pawn with 5.e6. > >> >>>it claims that white's best move is 6. Nf3, >>>>which did not occur in any of the games you posted (citing Hector-Sergeev). >>> >>>Of course it did occur in a game I posted: Balogh-Miroshnichenko >>>Also 6.dxc5 Nc6 7.Nf3 leads to the same position as 6.Nf3 Nc6 7.dxc5. >> >>...balogh (2135) - miroshnichenko (2500). do you really think this type of game >>has any theoretical value at all?? but i admit, i missed it in your first post! > >Every game can have a theoretical importance. Of course I prefer a game between >two strong players but unfortunately I was not able to find any strong players >who played 5.e6 recently ... > >Michael > >> >>cheers >> martin Your right there is one game played by 1600 rated player which did have theoretical valeu. But there is a difference in human and computer evaluation in 6 Nf3 And the other candidates We are talking about time or tempo! And in human and computer evaluations the other moves fail at that point. Because both solve Black's problems at that point. You should look why one move is better then the other and only then start evaluating the postion Otherwise there is no point in evaluating. Results for sure don't always give a good vieuw on that. (For example There are many games in which one side lost or drawed a won postion because of time trouble. Or one or both sides overlooked certain moves.) And then I am not even talking about theoretical valeu. Only about evaluation. Marc
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