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Subject: Re: Mystery (solved) Influence of EGTB

Author: Kurt Utzinger

Date: 03:37:39 05/23/04

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On May 23, 2004 at 05:41:28, Mihaly Szalai wrote:

>Hello Kurt,
>
>I don't understand this "most engines are unable to assess
>this simple position as a draw". Am I missing something?
>No problem for Fritz, Junior, Patzer, Hiarcs, Crafty and Smarthink:
>
>Bologan,V - Dizdarevic,E, Bosna 2004 Sarajevo 2004
>8/p3k3/2p5/4K3/P7/2P5/8/8 b - - 0 1


      Hi Mihaly
      Oops: I testes without EGTB and it makes much difference
      if you use no EGTB, 3-/4-men EGTB or even 5-men EGTB as
      you can see below, all on P4 1.8/32 MB hash.
      Kurt

Bologan,V - Dizdarevic,E
8/p3k3/2p5/4K3/P7/2P5/8/8 b - - 0 1

Analysis by Fritz 8: (without EGTB)

60...a5 61.Kd4 Kd6 62.Kc4 Kc7 63.Kc5 Kb7
  ²  (0.28)   Depth: 7/12   00:00:00  3kN
  +-  (3.97)   Depth: 11/21   00:00:00  33kN
60...Kd7!
  +-  (3.94)   Depth: 11/21   00:00:00  46kN
  +-  (1.60)   Depth: 35/56   00:05:32  319204kN


Analysis by Fritz 8: (with 4-men EGTB)

60...a5 61.Kd4 Kd6 62.Kc4 Kc7 63.Kc5 Kb7
  ²  (0.28)   Depth: 7/12   00:00:00  3kN
  +-  (3.97)   Depth: 11/21   00:00:00  33kN
60...Kd7 61.a5 Ke7 62.c4 c5 63.Kd5 Kd7 64.Kxc5 Kc7 65.Kd5 Kd7 66.Ke5 Kc6 67.Kd4
Kd6 68.Kd3 Kc5
  +-  (3.94)   Depth: 11/21   00:00:00  46kN
  =  (0.00)   Depth: 41/47   00:04:03  118309kN, tb=40094762


Analysis by Fritz 8: (with 5-men EGTB)

60...a5 61.Kd4 Kd6 62.Kc4 Kc7 63.Kc5 Kd7 64.Kb6
  ²  (0.28)   Depth: 7/12   00:00:00  3kN
  +-  (3.94)   Depth: 11/21   00:00:00  28kN, tb=196
60...Kd7 61.a5 Kc7 62.c4 c5 63.Kd5 Kd7 64.Ke5 Kc7
  +-  (3.91)   Depth: 11/21   00:00:00  41kN, tb=203
  =  (0.00)   Depth: 57/57   00:00:17  5065kN, tb=1389318








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