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Subject: Re: CM 8000 results for the famous Ortueta vs Sanz Madrid position

Author: James T. Walker

Date: 15:30:52 05/17/02

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On May 17, 2002 at 16:09:11, ALI MIRAFZALI wrote:

>[D]8/pR4pk/1b6/2p5/N1p5/8/PP1r2PP/6K1 b
>It takes CM 8000 56 minutes 59 seconds( on a 700 MHz PC)to see that 1..Rxb2!!
>wins.Here is the line.Moves:Rxb2 Nxb2 c3 Rxb6 c4 Rb7 a5 Rb5 c2 Kf2 c1Q Ke2 Qc2+
>Kf3 c3.This is found at ply 12 with a score of -1.69.Please indicate your
>result.

Hiarcs 8 finds Rxb2 in 1:32 on my AMD 1.4G also in ply 12.
Analysis by Hiarcs 8:

1...Rd6
  ±  (0.93)   Depth: 1   00:00:00
1...Rd6 2.Re7
  ±  (1.03)   Depth: 2/9   00:00:00
1...Rd6 2.Re7 Rd2
  ±  (0.80)   Depth: 3/11   00:00:00
1...Kg6 2.h4
  ²  (0.67)   Depth: 3/11   00:00:00
1...Kg6 2.g4 Rd6
  ²  (0.61)   Depth: 3/14   00:00:00
1...Kg6 2.Kf1 Rd6 3.Re7
  ±  (0.76)   Depth: 4/14   00:00:00
1...Kg6 2.Kf1 Rd6 3.Kf2 Kf6
  ²  (0.70)   Depth: 5/16   00:00:00  8kN
1...Bd8 2.Rxa7 Bf6 3.Rb7 Bd4+ 4.Kf1 Rf2+ 5.Ke1 Rxg2
  ²  (0.69)   Depth: 5/16   00:00:00  13kN
1...Bd8 2.Rxa7 Bf6 3.Rb7 Bd4+ 4.Kf1 Rf2+ 5.Ke1 Rxg2
  ²  (0.69)   Depth: 6/16   00:00:01  35kN
1...Bd8 2.Rxa7 Bf6 3.Rb7 Bd4+ 4.Kf1 Rf2+ 5.Ke1 Rxg2
  ²  (0.69)   Depth: 7/18   00:00:02  96kN
1...Kh6 2.Kf1 g5 3.h3 Kg6 4.g3 Rd6
  ²  (0.68)   Depth: 7/18   00:00:03  135kN
1...Kh6 2.h3 Kg6 3.Kf1 Rd6 4.Kf2 Kf6 5.Nxb6
  ±  (0.79)   Depth: 8/20   00:00:05  306kN
1...Bd8 2.Rxa7
  ²  (0.43)   Depth: 8/23   00:00:06  365kN
1...Bd8 2.Rxa7 Bf6 3.Kf1 Bxb2
  ²  (0.40)   Depth: 8/24   00:00:06  413kN
1...Bd8 2.Rxa7 Bf6 3.h4 Bxh4 4.Rb7 Kg6 5.Kh2 Bf2 6.Rc7
  =  (0.22)   Depth: 9/24   00:00:10  838kN
1...Bd8 2.Kf1 Bf6 3.h3 c3 4.Nxc3 Bxc3 5.bxc3 Rxa2 6.h4
  ²  (0.34)   Depth: 10/24   00:00:20  2054kN
1...Bd8 2.Kf1
  =  (0.09)   Depth: 11/26   00:00:36  4141kN
1...Bd8 2.Kf1
  =  (0.09)   Depth: 11/26   00:00:39  4793kN
1...Bd8 2.Kf1 Bf6 3.h3 Kh6 4.g3 c3 5.Nxc3 Bxc3 6.bxc3 Rxa2 7.Rb5 c4
  =  (0.09)   Depth: 12/30   00:01:08  11068kN
1...Rxb2 2.Nxb2
  =  (-0.16)   Depth: 12/30   00:01:32  16568kN
1...Rxb2 2.Nxb2 c3 3.Rxb6 c4 4.Rb4 a5 5.Rb5 c2 6.Kf2 c1Q 7.Kg3 Qe3+ 8.Kg4 c3
  -+  (-2.20)   Depth: 12/31   00:02:16  26195kN, tb=2
1...Rxb2 2.Nxb2
  -+  (-2.45)   Depth: 13/32   00:02:56  35288kN, tb=7
1...Rxb2 2.Nxb2 c3 3.Rxb6 c4 4.Rb4 a5 5.Nd3 cxd3
  -+  (-2.46)   Depth: 13/32   00:02:59  35886kN, tb=7
1...Rxb2 2.Nxb2
  -+  (-2.71)   Depth: 14/35   00:06:06  78791kN, tb=35
1...Rxb2 2.Nc3 Rc2 3.Ne4 c3 4.Kf1 Kg6 5.Re7
  -+  (-3.09)   Depth: 14/39   00:10:19  133787kN, tb=37
1...Rxb2 2.Nc3 Rc2 3.Ne4 c3 4.Kf1 c4 5.Re7 Rc1+ 6.Ke2 c2 7.Kd2 Be3+ 8.Kc3 Bd4+
9.Kd2 Rg1 10.Kxc2 Rxg2+ 11.Kc1 Rxh2
  -+  (-3.30)   Depth: 15/39   00:19:22  255290kN, tb=104
1...Rxb2 2.Nc3 Rc2 3.Ne4 c3 4.Kf1 Kg6 5.Re7 Rxg2 6.Nxc3 Rxh2 7.a3 Rd2 8.Re2 Rd3
9.Rc2 Kf5 10.Ke2
  -+  (-3.34)   Depth: 16/44   00:36:41  485510kN, tb=360



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