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Subject: a simple test position that is hard for Shredder and hiarcs7.32

Author: Uri Blass

Date: 03:57:53 01/04/02

How much time do programs need to avoid 74.Nxb5
Most programs need few seconds when
Hiarcs7.32(48 Mbytes hash) needs almost 10 minutes on p800

Shredder6 could not avoid Nxb5 even in 112 seconds
based on the pgn of it's games against tiger aggresive.

Shredder 6 - Gambit Tiger 2.0
[D]8/5rbk/6q1/1p1Q4/1PpP2p1/2N2p2/5PP1/3R2K1 w - - 0 1

Analysis by Hiarcs 7.32:

74.Nxb5 fxg2 75.Kxg2
  +-  (1.60)   Depth: 1   00:00:00
74.Nxb5 fxg2
  ±  (1.23)   Depth: 2/10   00:00:00
74.Nxb5 fxg2 75.Qxg2
  ±  (0.76)   Depth: 2/10   00:00:00
74.Nxb5 fxg2
  ±  (1.01)   Depth: 3/13   00:00:00
74.Nxb5 fxg2
  ±  (1.01)   Depth: 3/14   00:00:00
74.Nxb5 fxg2 75.Qxc4 Qf5 76.Rd2
  ±  (1.07)   Depth: 4/14   00:00:00
74.Nxb5 fxg2
  ±  (0.81)   Depth: 5/16   00:00:00  8kN
74.Nxb5 fxg2
  ±  (0.81)   Depth: 5/19   00:00:00  15kN
74.Nxb5 Rf5
  ²  (0.56)   Depth: 6/21   00:00:00  74kN
74.Nxb5 Rf5 75.Qd7 Rh5 76.Nd6
  =  (-0.01)   Depth: 6/23   00:00:01  100kN
74.Nxb5 Rf5
  ³  (-0.26)   Depth: 7/23   00:00:02  222kN
74.Nxb5 Rf5 75.Qxc4 Qh5 76.Qc2 g3 77.gxf3 Qh2+
  ³  (-0.38)   Depth: 7/25   00:00:02  279kN
74.Nxb5 Rf5
  ³  (-0.63)   Depth: 8/25   00:00:06  686kN
74.Nxb5 Rf5
  ³  (-0.63)   Depth: 8/27   00:00:08  837kN
74.Nxb5 Rf5
  ³  (-0.38)   Depth: 9/27   00:00:39  3940kN
74.Nxb5 Rf5 75.Qxc4 Qh5 76.Qc2 g3 77.gxf3
  ³  (-0.38)   Depth: 9/29   00:00:43  4378kN
74.Nxb5 Rf5
  ³  (-0.63)   Depth: 10/29   00:01:20  8215kN
74.Nxb5 Rf5 75.Qxc4 Qh5 76.Qc7 g3 77.Qxg3 Rg5 78.Nc3 Rxg3 79.fxg3
  -+  (-1.59)   Depth: 10/30   00:02:50  17774kN
74.Re1 fxg2 75.Ne4 Rf5 76.Qb7 Kg8 77.Kxg2 Bxd4 78.Rd1 Bg7 79.Nd6 Rf3 80.Nxb5
  µ  (-0.88)   Depth: 10/30   00:09:45  59913kN
74.Ne4 Rf5 75.Qd7 Rf4 76.Ng3 Qf7 77.Qxf7 Rxf7 78.Ne4 Rf4 79.Ng5+ Kg8 80.Ne6 Re4
81.Nxg7 Kxg7
  ³  (-0.66)   Depth: 10/30   00:15:51  94551kN

(Blass, Tel-aviv 04.01.2002)

Uri

Re: a simple test position that is hard for Shredder and hiarcs7.32 Ernst Walet 01:40:28 01/05/02
Re: a simple test position that is hard for Shredder and hiarcs7.32 Martin Giepmans 17:40:31 01/04/02
Re: a simple test position that is hard for Shredder and hiarcs7.32 Dann Corbit 16:52:04 01/04/02
Re: a simple test position that is hard for Shredder and hiarcs7.32 Thomas Mayer 15:38:49 01/04/02
Re: a simple test position that is hard for Shredder and hiarcs7.32 Dann Corbit 15:31:59 01/04/02
Re: a simple test position that is hard for Shredder and hiarcs7.32 Dann Corbit 15:10:03 01/04/02
Re: a simple test position that is hard for Shredder and hiarcs7.32 Dann Corbit 14:57:33 01/04/02
- Re: a simple test position that is hard for Shredder and hiarcs7.32 John Merlino 19:12:37 01/04/02
Re: a simple test position that is hard for Shredder and hiarcs7.32 Gian-Carlo Pascutto 14:35:01 01/04/02
- Re: a simple test position that is hard for Shredder and hiarcs7.32 Uri Blass 15:58:34 01/04/02
  - Re: a simple test position that is hard for Shredder and hiarcs7.32 Uri Blass 16:15:52 01/04/02
    - Re: a simple test position that is hard for Shredder and hiarcs7.32 Miguel A. Ballicora 16:27:08 01/04/02
Re: a simple test position that is hard for Shredder and hiarcs7.32 Miguel A. Ballicora 12:27:50 01/04/02
Re: a simple test position that is hard for Shredder and hiarcs7.32 Peter Berger 11:26:36 01/04/02
Re: a simple test position that is hard for Shredder and hiarcs7.32 Andrew Williams 08:54:05 01/04/02
Re: a simple test position that is hard for Shredder and hiarcs7.32 Ingo Bauer 07:00:40 01/04/02
- Re: a simple test position that is hard for Shredder and hiarcs7.32 Uri Blass 07:47:51 01/04/02
  - Re: a simple test position that is hard for Shredder and hiarcs7.32 Dieter Buerssner 09:05:17 01/04/02
    - Re: a simple test position that is hard for Shredder and hiarcs7.32 Uri Blass 11:33:47 01/04/02

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