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Subject: Re: Fritz - Quark (CCT4) after black's 61. move

Author: Uri Blass

Date: 04:17:50 01/28/02

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On January 28, 2002 at 04:35:34, Jouni Uski wrote:

>[D]1K6/1P6/5k2/8/6pp/1R6/8/2r5 w - -
>
>Is this still a draw? Yace and Crafty evaluate 0.00 after quite a long analysis
>(with 4 piece TBs).
>
>Jouni

Yace analysis at move 64(KRKPP was not used)

It seems that the decisive blunder was 64.Rb4+

Fritz 7.0.0.6 - QuarkX
[D]1K6/1P6/8/1R6/5kpp/8/8/2r5 w - - 0 1

Analysis by Yace 0.99.56:

64.Rc5 Rxc5
  -+  (-8.77)   Depth: 1   00:00:05
64.Rd5
  -+  (-1.56)   Depth: 1   00:00:05
64.Rh5
  -+  (-1.52)   Depth: 1   00:00:05
64.Rh5 h3
  -+  (-1.78)   Depth: 2   00:00:05
64.Rb4+ Kf3
  -+  (-1.54)   Depth: 2   00:00:05
64.Rb4+ Kf3 65.Ka7
  -+  (-1.52)   Depth: 2   00:00:05
64.Rb4+ Kf3 65.Rb3+ Ke4 66.Rb4+ Kf5
  -+  (-1.50)   Depth: 3   00:00:05
64.Rb4+ Kf3 65.Rb3+ Kf2 66.Rb2+ Kg3 67.Rb3+ Kg2 68.Rb2+ Kh3
  -+  (-1.43)   Depth: 4   00:00:05
64.Ka7 h3 65.b8Q+ Kf3
  -+  (-1.42)   Depth: 4   00:00:05
64.Ka7 Rc7 65.Kb6 Rxb7+ 66.Kxb7
  ±  (1.35)   Depth: 4   00:00:05
64.Ka7 Rc7 65.Rb4+ Kf3 66.Kb6 Rxb7+ 67.Kxb7
  ±  (1.37)   Depth: 5   00:00:05  5kN
64.Ka7 Rc7 65.Rb4+ Kf3 66.Ka8 Rxb7 67.Rxb7
  ±  (1.21)   Depth: 6   00:00:05  10kN
64.Ka7 Rc7 65.Ka6 Rxb7 66.Rxb7 h3 67.Rf7+ Ke4 68.Kb5
  ±  (1.21)   Depth: 7   00:00:05  24kN
64.Ka7 Rc7 65.Ka6 Rxb7 66.Rxb7 h3 67.Rf7+ Kg3 68.Kb5 Kh2
  ±  (1.16)   Depth: 8   00:00:05  41kN
64.Ka7 Rc7 65.Ka6 Rxb7 66.Rxb7 h3 67.Rf7+ Ke5 68.Rh7 Kf4 69.Kb5
  ±  (1.12)   Depth: 9   00:00:05  186kN
64.Ka7 Rc7 65.Ka6 Rxb7 66.Rxb7 g3 67.Rf7+ Ke5 68.Re7+ Kf4 69.Kb5 g2 70.Kb6 g1Q+
71.Kb7
  ±  (0.72)   Depth: 10   00:00:07  557kN
64.Ka7 Rc7 65.Ka6 Rxb7 66.Rxb7 g3 67.Rf7+ Ke5 68.Rg7 Kf4 69.Rf7+ Ke5 70.Rg7 Kf4
71.Rf7+
  =  (0.00)   Depth: 10   00:00:07  621kN
64.Ka7 Rc7 65.Ka6 Rxb7 66.Rxb7 g3 67.Rb4+ Kf3 68.Rb3+ Ke4 69.Rb4+ Ke5 70.Rg4 Kf5
71.Rg8 Ke5
  =  (0.00)   Depth: 11   00:00:15  1867kN
64.Ka7 Rc7 65.Rb4+ Kf5 66.Rb5+ Kf4
  =  (0.00)   Depth: 12   00:00:24  4734kN
64.Ka7 Rc7 65.Rb4+ Kf3 66.Rb3+ Kg2 67.Rb4 Kh3 68.Kb6 Rxb7+ 69.Kxb7 g3 70.Rb5 g2
71.Rg5
  =  (-0.01)   Depth: 13   00:00:41  10328kN
64.Rb4+ Kf5 65.Ka7 Rc7 66.Rb5+ Kf4 67.Rb4+ Kf3 68.Rb3+ Kf2 69.Rb2+ Kg3 70.Ka8
Rxb7 71.Kxb7 h3 72.Kc8 h2 73.Rb1 Kg2 74.Kd7 h1Q 75.Rb2+ Kh3 76.Rb3+ g3 77.Rb4
  =  (0.00)   Depth: 13   00:01:03  16153kN
64.Rb4+ Kf5 65.Ka7 Rc7 66.Rb5+ Kf4 67.Rb4+ Kf3 68.Rb3+ Kf2 69.Rb2+ Kg3 70.Ka8
Rxb7 71.Kxb7 h3 72.Kc8 h2 73.Rb1 Kg2 74.Kd7 h1Q
  =  (0.00)   Depth: 13   00:01:06  17098kN
64.Rb4+ Kf5 65.Ka7 Rc7 66.Ka8 Rxb7 67.Rxb7 h3 68.Rh7 Kg6 69.Rh4 h2 70.Rxh2 Kg5
71.Rh7 g3 72.Rh8 Kf5 73.Rg8 Kf4 74.Rh8 g2 75.Rg8 Kf3 76.Rf8+ Kg3 77.Rg8+ Kh3
78.Rh8+ Kg3
  =  (0.00)   Depth: 14   00:01:54  31448kN
64.Rb4+ Kf5 65.Ka8 Ra1+ 66.Kb8 Rc1
  =  (0.00)   Depth: 15   00:03:51  67128kN
64.Rb4+ Kg3 65.Ka8 Ra1+ 66.Kb8 Kh3
  =  (-0.01)   Depth: 16   00:09:57  163516kN
64.Ka8 Ra1+ 65.Kb8 Rc1
  =  (0.00)   Depth: 16   00:19:33  317293kN
64.Ka8 Ra1+ 65.Kb8 Rc1 66.Rb4+ Kg3 67.Ka8 Ra1+ 68.Kb8 Kh3
  =  (0.00)   Depth: 16   00:19:34  317463kN
64.Ka8 Ra1+ 65.Kb8 Rc1
  =  (0.00)   Depth: 17   00:23:02  354189kN

(Blass, Tel-aviv 28.01.2002)

Uri



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