Author: Uri Blass
Date: 02:34:00 01/07/01
Go up one level in this thread
On January 07, 2001 at 05:08:45, Dieter Buerssner wrote:
>On January 06, 2001 at 00:53:10, Uri Blass wrote:
>
>>Here is a position(from game 5 of the match) when I believe that DB1 made a
>>tactical mistake(I did not try to prove it by a tree but it is my impression).
>>
>>3r2k1/p4bp1/5q1p/8/3Npp2/1PQ5/P2R1PPP/6K1 w - - 0 1
>>
>>White played g3 when I believe that the only move is Ne2
>>The tactics is quite(white has a lot of possibilities in every move) and this is
>>the reason that the singular extensions could not help DB1.
>>
>>I think that it may be interesting to know how much time do programs need to
>>find Ne2 and what is the depth that programs of today need to see significant
>>difference between g3 and Ne2.
>
>After a really long time, Yace sees a difference of 0.3 between g3 and
>Ne2 (pawn value is 0.8). It also shows Rd5 as reply to g3.
>Note that the node counter overflew during the test. This also was tested
>on a computer, that was relatively busy, at least during part of the time,
>and therefore also with a relatively small hash of 20M. AMD K6-2 475.
>Depth 15 had a very bad branching factor ...
>
> nodes time score depth
> 21767004 3:34.2 -0.44 11t 1.g3 Qg5 2.Nc6 Rxd2 3.Qxd2 Qf6 4.Qd8+ Qxd8
> 5.Nxd8 e3 6.Kf1 g5 7.Nxf7 Kxf7 {0}
> 56741894 9:49.6 -0.44 11. 1.g3 Qg5 2.Nc6 Rxd2 3.Qxd2 Qf6 4.Qd8+ Qxd8
> 5.Nxd8 e3 6.Kf1 g5 7.Nxf7 Kxf7 {0}
> 82427993 14:28.2 -0.42 12t 1.g3 Qg5 2.Nc6 Rxd2 3.Qxd2 Qc5 4.Nd4 g5 5.g4
> Qd6 6.Qc3 Kf8 7.Qc8+ Kg7 {HT} {-10}
> 118995125 21:10.4 -0.42 12. 1.g3 Qg5 2.Nc6 Rxd2 3.Qxd2 Qc5 4.Nd4 g5 5.g4
> Qd6 6.Qc3 Kf8 7.Qc8+ Kg7 {HT} {-10}
> 197551069 32:51.6 -0.46 13t 1.g3 Qg5 2.Nc6 Rxd2 3.Qxd2 Qc5 4.Nd4 g5 5.a4
> Kf8 6.Kf1 a5 7.h3 Qd6 {-10}
> 344578607 51:09.9 -0.46 13. 1.g3 Qg5 2.Nc6 Rxd2 3.Qxd2 Qc5 4.Nd4 g5 5.a4
> Kf8 6.Kf1 a5 7.h3 Qd6 {-10}
> 777852717 1:41:24 -0.46 14t 1.g3 Qg5 2.Nc6 Rxd2 3.Qxd2 Qc5 4.Nd4 g5 5.Kf1
> Qe5 6.Qc3 e3 7.Qc8+ Be8 8.gxf4 gxf4 9.fxe3 fxe3
> {-10}
> 953705364 2:02:36 -0.46 14. 1.g3 Qg5 2.Nc6 Rxd2 3.Qxd2 Qc5 4.Nd4 g5 5.Kf1
> Qe5 6.Qc3 e3 7.Qc8+ Be8 8.gxf4 gxf4 9.fxe3 fxe3
> {-10}
>3623500760 7:17:16 -0.86 15-- 1.g3 Rd5 2.Qc8+ Kh7 3.Qc3 Qe5 4.gxf4 Qxf4 5.Qc2
> Rg5+ 6.Kh1 Bxb3 7.axb3 Qg4 8.Qd3 exd3 9.f3 Qxd4
> 10.Rd1 {-1081}
>4194959670 8:18:26 -0.94 15t 1.g3 Rd5 2.Qc8+ Kh7 3.Qc3 Qe5 4.gxf4 Qxf4 5.Qe3
> Rg5+ 6.Kf1 Qxh2 7.Qxe4+ Bg6 8.Qe3H {HT} {-10}
>1261278366 11:38:58 -0.72 15t 1.h3 Kh7 2.g3 g5 3.a4 Qe5 4.gxf4 gxf4 5.Kf1 Be6
> 6.h4 e3 7.Rd3 Bh3+ 8.Ke1 Bg2 9.b4 {-10}
>2911352341 14:20:48 -0.71 15t+ 1.Ne2 Rxd2 2.Qxd2 Qa1+ 3.Nc1 f3
>3148632386 14:43:28 -0.64 15t 1.Ne2 Rxd2 2.Qxd2 Qa1+ 3.Nc1 Qe5 4.Ne2 e3
> 5.fxe3 fxe3 6.Qd8+ Kh7 7.Qd4 Qxd4 8.Nxd4 Bh5
> 9.Kf1 a5 10.Nf5 e2+ 11.Ke1 {HT} {-10}
>3168337215 14:45:25 -0.64 15. 1.Ne2 Rxd2 2.Qxd2 Qa1+ 3.Nc1 Qe5 4.Ne2 e3
> 5.fxe3 fxe3 6.Qd8+ Kh7 7.Qd4 Qxd4 8.Nxd4 Bh5
> 9.Kf1 a5 10.Nf5 e2+ 11.Ke1 {HT} {-10}
>
>Uri, recently you have posted a difficult position from a correspondence
>game, perhaps one of yourself. Unfortunately I have lost the position, and
>cannot find it here anymore easily. I believe the solution was Qg6 for white.
>I remember, that after the solution move, black could give many checks with
>the queen, but at some point, it was clear, that whit must be winning.
>Is it possible, that you repost the position, or send it by mail to me?
>Thanks in advance,
>Dieter
I will try to find the position that you want.
I do not remember a position when black could give many checks from a
correspondence game.
I remember that I posted a position some weeks or some monthes ago when black
had many checks after the solution but I do not remember if the solution was
Qg6(I remember that black could sacrifice a rook by Rxc2+ and after it to play
many checks).
I will try to find it.
Uri
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