Computer Chess Club Archives


Search

Terms

Messages

Subject: Can programs avoid Nxa8? [No real problem for CM9 SKR]

Author: Kurt Utzinger

Date: 04:26:34 03/15/03

Go up one level in this thread


On March 14, 2003 at 21:33:25, ALI MIRAFZALI wrote:

>The following astonishing position is taken from the game Atalik vs Gufeld
>Losangeles 2000:
>[D]r1b2rk1/1pNnq1b1/1B1p2n1/P2Pp2p/4Pp2/5Pp1/1P2B1PP/R2QNRK1 w
>Here Atalik played 21.h3 .In fact incorrect would be 21.Nxa8? However the
>analysis of why is very difficult and Complicated.Here are two sample lines
>given by Gufeld  A)21.Nxa8 Nxb6 22.Nxb6 Qh4 23.h3 Bxh3 24.gxh3 Qxh3 25.Rf2 gxf2
>26.Kxf2 Qh2+ 27.Ng2 Nh4 28.Qh1 Qg3+ 29.Kf1 Nxf3 30.Bxf3 Qxf3+ 31.Kg1 Qxe4
>32.Qh4 Qd4+ 33.Qf2 e4 34.Ra4 Qd1+ 35.Qe1 Qxe1+ 36.Nxe1 f3 37.Nc2 Rf4
>B) same as A) until 28: 28.Qf1 Rf6 29.Nc8 Bf8 30.Qh1 Qg3+ 31.Kf1 Nxf3 32.Rd1 Rg6
>All with advantage to Black.
>please indicate your result.

The King 3.23 SKR (CM9 SKR) avoids 21.Nxa8? after 1m24s on P4 1.8/32 HT

New game
r1b2rk1/1pNnq1b1/1B1p2n1/P2Pp2p/4Pp2/5Pp1/1P2B1PP/R2QNRK1 w - - 0 1

Analysis by The King 3.23:

1.Nxa8 gxh2+ 2.Kxh2 Nxb6 3.Nxb6 Qh4+ 4.Kg1
  +-  (5.63)   Depth: 3   00:00:00
1.Nxa8 gxh2+ 2.Kxh2 Nxb6 3.Nxb6 Qg5 4.Nxc8 Rxc8
  +-  (5.04)   Depth: 4   00:00:00
1.Nxa8 gxh2+ 2.Kxh2 Nxb6 3.Nxb6 Qh4+ 4.Kg1
  +-  (5.63)   Depth: 5   00:00:00
1.Nxa8 Nxb6 2.Nxb6 Qh4 3.h3 Bxh3 4.Na8 Rxa8 5.gxh3 Qxh3
  +-  (2.63)   Depth: 6   00:00:00  26kN
1.Nxa8 Nxb6 2.Nxb6 Qh4 3.h3 Bxh3 4.Na8 Rxa8 5.gxh3 Qxh3
  +-  (2.63)   Depth: 7   00:00:00  75kN
1.Nxa8 Nxb6 2.Nxb6 Qh4 3.h3 Bxh3 4.gxh3 Qxh3 5.Rf2 gxf2+ 6.Kxf2 Nh4 7.Bb5 Qh2+
8.Kf1 Qxb2
  +-  (1.47)   Depth: 8   00:00:00  102kN
1.Nxa8 Nxb6 2.Nxb6 Qh4 3.h3 Bxh3 4.gxh3 Qxh3 5.Rf2 gxf2+ 6.Kxf2 Nh4 7.Nd3 Qh2+
8.Ke1 Qg1+ 9.Kd2
  +-  (1.69)   Depth: 9   00:00:01  214kN
1.Nxa8 Nxb6 2.Nxb6 Qh4 3.h3 Bxh3 4.gxh3 Qxh3 5.Rf2 gxf2+ 6.Kxf2 h4 7.Nd3 Qg3+
8.Kf1 h3 9.Nf2 h2 10.Bb5 Nh4
  +-  (1.59)   Depth: 10   00:00:02  447kN
1.Nxa8 Nxb6 2.Nxb6 Qh4 3.h3 Bxh3 4.gxh3 Qxh3 5.Rf2 gxf2+ 6.Kxf2 h4 7.Bc4 Qh2+
8.Kf1 Qh1+ 9.Ke2 Qh2+ 10.Kd3 Qxb2 11.Nc2
  ±  (1.03)   Depth: 11   00:00:08  1317kN
1.Nxa8 Nxb6 2.Nxb6 Qh4 3.h3 Bxh3 4.gxh3 Qxh3 5.Rf2 gxf2+ 6.Kxf2 h4 7.Bc4 Qh2+
8.Kf1 Qh1+ 9.Ke2 Qh2+ 10.Kd3 Qf2 11.Nc2 h3
  ²  (0.53)   Depth: 12   00:00:38  5769kN
1.h3 Nxb6 2.axb6 Rxa1 3.Qxa1 Kh7 4.Qa2 Bd7 5.Nd3 Qh4 6.Ne6 Rc8 7.Qb3 Kg8 8.Ra1
  ±  (0.79)   Depth: 12   00:01:24  12726kN
1.h3 Nxb6 2.axb6 Rxa1 3.Qxa1 Nh8 4.Bb5 Nf7 5.Qa4 Ng5 6.Nd3 Rd8 7.Rc1 Bxh3 8.gxh3
Nxf3+ 9.Kh1 Rf8
  ±  (0.86)   Depth: 13   00:01:48  16717kN
1.h3 Nxb6 2.axb6 Rxa1 3.Qxa1 Qh4 4.Ne6 Bxe6 5.dxe6 Qd8 6.Qa7 Qc8 7.Nd3 Qc2 8.Re1
Qc6 9.Rc1
  ±  (1.02)   Depth: 14   00:03:47  36252kN

(Utzinger, MyTown 15.03.2003)




This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.