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Subject: Re: another test position based on my correspondence game

Author: Uri Blass

Date: 04:37:22 11/06/01

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On November 06, 2001 at 07:31:32, Rex wrote:

>Here are my results running a 1.533Ghz --  GT2
>
>00:00:00.1	1.50	8	131389	exd5 Nf5
>00:00:01.2	1.90	9	414063	exd5 Nf5
>00:00:01.2	1.90	9	414063	exd5 Nf5
>
>Rex

Gandalf also liked exd5 after a short time and the problem was that it changed
it's mind after 14:27 to a worse move.

After exd5 Bxh6 is the best move and if GT2 does not see Bxh6 in the main line
then you did not give it enough time

Gandalf found Bxh6 in the main line before changing it's mind.

I also feel more sure that the test position is correct after the following
analysis by Gandalf after 15...exd5 16.Bxh6 gxh6 17.Qxh6+ Nh7 18.Nf5

Gandalf understands that it had no reason to be so happy.

Uri Blass - Yoav dothan
r4r1k/1bqnbp1n/p2p3Q/1p1p1N2/4P3/P7/1PP1BPPP/3RR1K1 b - - 0 1

Analysis by Gandalf 4.32h:

18...Nb6 19.Qg7#
  +-  (#1)   Depth: 2   00:00:01
18...Bf6
  +-  (#1)   Depth: 2   00:00:01
18...Bf6 19.c3 dxe4 20.Rxd6
  -+  (-2.54)   Depth: 2   00:00:01
18...Bf6 19.b3 Qxc2 20.Nxd6
  -+  (-2.67)   Depth: 4   00:00:01
18...Bf6 19.Rd3 Rfe8 20.Rh3 Ndf8
  -+  (-2.35)   Depth: 5   00:00:01  45kN
18...Bf6 19.Rd3 Rg8 20.Rh3 Rxg2+ 21.Kxg2 Ndf8
  +-  (1.64)   Depth: 6   00:00:02  47kN
18...Rg8
  +-  (1.63)   Depth: 6   00:00:02  47kN
18...Rg8 19.Nxe7 Ndf6 20.Nxg8 Rxg8 21.Bf3 dxe4
  +-  (1.56)   Depth: 6   00:00:02  47kN
18...Rg8 19.Nxe7 Rg7 20.exd5 Qxc2 21.b4 Re8
  +-  (1.68)   Depth: 7   00:00:04  500kN
18...Rg8
  ±  (1.23)   Depth: 8   00:00:07  1250kN
18...Rg8 19.Nxe7 Rg7 20.exd5 Ne5 21.Nf5 Rg6 22.Qd2
  ±  (1.00)   Depth: 8   00:00:10  2100kN
18...Rg8 19.Nxe7 Rg7 20.c3 dxe4 21.Rxd6 Ne5 22.Nf5 Rg5
  ±  (0.94)   Depth: 9   00:00:21  4700kN
18...Rg8 19.Nxe7 dxe4 20.Nxg8 Rxg8 21.Rxd6 e3 22.f3 Ne5 23.Bd3
  ±  (1.00)   Depth: 10   00:00:56  13400kN
18...Rg8 19.Nxe7 Ndf6 20.Nxg8 Rxg8 21.exd5 Qxc2 22.Bf3 Qxb2 23.Re7
  ²  (0.70)   Depth: 11   00:03:13  44150kN
18...Rg8 19.Nxe7 Ndf6 20.Nxg8 Rxg8 21.exd5 Qxc2 22.Bd3 Qxf2+ 23.Kxf2
  ²  (0.59)   Depth: 12   00:08:31  118350kN

(Blass, Tel-aviv 06.11.2001)

Uri



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