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Subject: Re: A key position

Author: Uri Blass

Date: 05:15:36 10/17/02

Go up one level in this thread


On October 17, 2002 at 06:49:05, Gian-Carlo Pascutto wrote:

>On October 17, 2002 at 06:21:33, Gian-Carlo Pascutto wrote:
>
>>On October 17, 2002 at 04:51:28, Christophe Drieu wrote:
>>
>>[D]8/8/8/p3k2p/P3p3/2P1KpPP/8/8 b - - 0 7
>
>Of course this is a mistake by white.
>
>Rxf3 gxf3 Kd2 e5 Ke3 e4 and now a4 instead of b3 wins outright
>
>[D]8/4k3/8/pp5p/P3p3/2P1KpP1/1P5P/8 b - a3 0 4
>
>--
>GCP

Hard to see for yace even in this position:

New position
8/4k3/8/pp5p/P3p3/2P1KpP1/1P5P/8 b - a3 0 1

Analysis by Yace 0.99.56:

4...b5xa4 5.Ke3xe4
  -+  (-1.44)   Depth: 1   00:00:02
4...b5xa4 5.Ke3xe4
  -+  (-1.44)   Depth: 2   00:00:02
4...b5xa4 5.c3-c4 a4-a3
  -+  (-1.55)   Depth: 3   00:00:02
4...b5xa4 5.c3-c4 a4-a3 6.b2xa3
  -+  (-1.55)   Depth: 4   00:00:02
4...b5xa4 5.h2-h3 Ke7-e6 6.g3-g4 h5xg4 7.h3xg4
  -+  (-1.86)   Depth: 5   00:00:02  3kN
4...b5xa4 5.h2-h3 Ke7-e6 6.g3-g4 h5xg4 7.h3xg4
  -+  (-1.86)   Depth: 6   00:00:02  63kN
4...b5xa4 5.h2-h3 Ke7-e6 6.g3-g4 h5xg4 7.h3xg4 Ke6-e5 8.g4-g5
  -+  (-1.88)   Depth: 7   00:00:02  118kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-f5 7.c4-c5 Kf5-e5
  -+  (-1.88)   Depth: 8   00:00:03  276kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-e6 7.g3-g4 h5xg4 8.h3xg4 Ke6-e5 9.g4-g5
Ke5-f5 10.c4-c5 Kf5xg5
  -+  (-1.81)   Depth: 9   00:00:03  559kN
4...b5xa4 5.h2-h3 Ke7-f6 6.Ke3-f2 Kf6-g5 7.Kf2-e3 Kg5-f5 8.c3-c4 Kf5-f6 9.c4-c5
  -+  (-1.81)   Depth: 10   00:00:04  1039kN
4...b5xa4 5.h2-h3 Ke7-f6 6.Ke3-f2 Kf6-g5 7.Kf2-e3 Kg5-f5 8.Ke3-f2 Kf5-e5
9.Kf2-e3 Ke5-d5
  -+  (-1.80)   Depth: 11   00:00:06  2352kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-e5 7.g3-g4 h5xg4 8.h3xg4 Ke5-d6 9.g4-g5
Kd6-c5 10.g5-g6 Kc5xc4 11.Ke3xe4 a4-a3 12.b2xa3 f3-f2 13.g6-g7 f2-f1Q 14.g7-g8Q+
Kc4-c3
  µ  (-1.40)   Depth: 12   00:00:10  3951kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-e5 7.g3-g4 h5-h4 8.g4-g5 Ke5-f5 9.c4-c5
Kf5-e5
  µ  (-1.21)   Depth: 12   00:00:11  4550kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-e5 7.g3-g4 h5-h4 8.c4-c5 Ke5-d5 9.g4-g5
Kd5xc5 10.g5-g6 Kc5-d6
  µ  (-1.24)   Depth: 13   00:00:23  11016kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-e5 7.g3-g4 h5xg4 8.h3xg4 f3-f2 9.Ke3xf2
Ke5-d4 10.g4-g5 Kd4xc4 11.g5-g6 e4-e3+ 12.Kf2xe3 Kc4-b5
  µ  (-0.84)   Depth: 14   00:00:35  17280kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-g6 7.g3-g4 h5xg4 8.h3xg4 Kg6-g5 9.c4-c5
Kg5xg4 10.c5-c6 Kg4-g3 11.c6-c7 f3-f2 12.c7-c8Q f2-f1Q 13.Ke3xe4 Qf1-b1+
14.Ke4-d5 Qb1xb2
  µ  (-0.80)   Depth: 14   00:00:43  21470kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-g6 7.c4-c5 Kg6-f6 8.c5-c6 Kf6-e6 9.g3-g4
  ³  (-0.41)   Depth: 15   00:01:36  47625kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-g6 7.c4-c5 Kg6-f6 8.c5-c6 Kf6-e6 9.g3-g4
a4-a3 10.b2xa3 h5xg4 11.h3xg4 Ke6-d6 12.g4-g5 Kd6xc6 13.g5-g6 Kc6-b7 14.Ke3xe4
f3-f2 15.g6-g7 f2-f1R 16.g7-g8Q a5-a4
  =  (0.01)   Depth: 16   00:03:10  89201kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-g6 7.c4-c5 Kg6-f6 8.c5-c6 Kf6-e6 9.g3-g4
a4-a3 10.b2xa3 h5xg4 11.h3xg4 Ke6-d6 12.g4-g5 f3-f2 13.Ke3xf2 Kd6-c5 14.g5-g6
Kc5-d4 15.g6-g7 e4-e3+ 16.Kf2-g2 e3-e2
  ±  (1.01)   Depth: 16   00:03:23  94775kN
4...b5xa4 5.h2-h3
  ±  (1.01)   Depth: 16   00:03:43  102704kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-e6 7.g3-g4 h5-h4 8.c4-c5 Ke6-e7 9.g4-g5
f3-f2 10.Ke3xf2 a4-a3 11.b2xa3 a5-a4 12.c5-c6 Ke7-e6 13.Kf2-g2 e4-e3 14.c6-c7
Ke6-d7 15.c7-c8Q+ Kd7xc8
  +-  (1.41)   Depth: 17   00:08:40  245914kN
4...b5xa4 5.h2-h3
  +-  (1.41)   Depth: 17   00:08:45  247993kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-e6 7.g3-g4 h5xg4 8.h3xg4 a4-a3 9.b2xa3
f3-f2 10.Ke3xf2 Ke6-f6 11.c4-c5 a5-a4 12.g4-g5+ Kf6-f7 13.Kf2-g2 Kf7-g6 14.c5-c6
e4-e3 15.c6-c7 e3-e2 16.Kg2-f2 e2-e1R 17.c7-c8Q Kg6xg5
  +-  (1.81)   Depth: 18   00:15:41  450059kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-e6 7.g3-g4 h5-h4 8.g4-g5 Ke6-e7 9.c4-c5
Ke7-d7 10.c5-c6+ Kd7xc6 11.g5-g6 a4-a3
  +-  (7.03)   Depth: 18   00:18:57  548010kN
4...b5xa4 5.h2-h3 Ke7-f6 6.c3-c4 Kf6-e6 7.g3-g4 h5-h4 8.g4-g5 Ke6-e7 9.c4-c5
f3-f2 10.Ke3xf2 Ke7-f7 11.g5-g6+ Kf7xg6 12.c5-c6 Kg6-f5 13.c6-c7 Kf5-f4
14.c7-c8Q e4-e3+ 15.Kf2-g2 e3-e2 16.Kg2-f2 Kf4-g5
  +-  (7.43)   Depth: 19   00:46:03  1386346kN
4...b5xa4 5.h2-h3
  +-  (7.43)   Depth: 19   00:49:33  1486675kN

(Blass, Tel-aviv 17.10.2002)

Learning +7 to the root is also not easy because when I go back yace
get moves like 3...f2 with a score of only 2.20 for white.

Uri



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