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Subject: Re: Testposition, which program can hold the draw?

Author: Timothy J. Frohlick

Date: 12:03:16 07/23/02

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New game
8/r4p1p/8/4k1P1/8/pK4P1/R6P/8 w - - 0 1

Analysis by Hiarcs 8:PII 333MHz 32MB Hash on 96 MB RAM machine

1.Rxa3 Rxa3+ 2.Kxa3
  ±  (0.80)   Depth: 1   00:00:00
1.Rxa3 Rxa3+ 2.Kxa3
  ±  (0.80)   Depth: 3/9   00:00:00
1.Rxa3 Rxa3+ 2.Kxa3 Kf5 3.h4
  ²  (0.62)   Depth: 3/9   00:00:00
1.Rxa3 Rxa3+
  ²  (0.32)   Depth: 4/11   00:00:00
1.Rxa3 Rxa3+ 2.Kxa3 Kf5 3.h4 Kg4 4.Kb4 Kxg3
  =  (-0.13)   Depth: 4/11   00:00:00
1.h4 Kf5 2.Kb4 f6 3.gxf6 Kxf6 4.Rxa3 Rxa3 5.Kxa3
  ²  (0.31)   Depth: 4/14   00:00:00
1.h4 Ke4
  =  (0.02)   Depth: 5/14   00:00:00  5kN
1.h4 Ke4 2.Rxa3 Rxa3+
  =  (-0.13)   Depth: 5/14   00:00:00  5kN
1.h4 Ke4 2.Rxa3 Rxa3+ 3.Kxa3 Kf3 4.Kb4 Kxg3
  =  (-0.13)   Depth: 6/14   00:00:01  14kN
1.h4 Ke4 2.Rxa3 Rxa3+ 3.Kxa3 Kf3 4.Kb4 Kxg3 5.h5
  =  (-0.03)   Depth: 7/15   00:00:02  28kN, tb=1
1.h4 Ke4
  ³  (-0.28)   Depth: 8/16   00:00:02  44kN, tb=10
1.h4 Ke4 2.Rc2 a2 3.Rxa2 Rxa2 4.Kxa2
  ³  (-0.45)   Depth: 8/20   00:00:04  107kN, tb=11
1.h4 Kf5
  ³  (-0.70)   Depth: 9/21   00:00:07  229kN, tb=21
1.h4 Kf5 2.Rg2 Kg4 3.Ka2 Kf3 4.Rg1 Kf2
  µ  (-1.03)   Depth: 9/21   00:00:09  324kN, tb=32
1.Rxa3 Rxa3+ 2.Kxa3 Kf5 3.Kb4 Kxg5 4.Kc5 Kh5 5.Kd6 Kg4 6.Ke7 f5
  ³  (-0.65)   Depth: 9/21   00:00:10  346kN, tb=92
1.Rc2 a2 2.Rxa2 Rxa2 3.Kxa2 Kf5 4.h4 Kg4
  ³  (-0.41)   Depth: 9/21   00:00:12  441kN, tb=96
1.Rc2 a2
  ³  (-0.66)   Depth: 10/21   00:00:13  536kN, tb=105
1.Rc2 a2 2.Rxa2 Rxa2 3.Kxa2 Kf5 4.Kb2 Kxg5 5.Kc3 Kg4
  µ  (-0.74)   Depth: 10/22   00:00:15  630kN, tb=112
1.Rxa3 Rxa3+ 2.Kxa3 Kf5 3.Kb4 Kxg5 4.Kc4 f5 5.Kd3 f4 6.gxf4+ Kxf4 7.Ke2 Kg4
  ³  (-0.57)   Depth: 10/22   00:00:16  664kN, tb=206
1.Rxa3 Rxa3+ 2.Kxa3 Kf5 3.Kb4 Kxg5 4.Kc4 h6 5.Kd4 Kg4 6.Ke3 f6 7.Kf2
  ³  (-0.45)   Depth: 11/25   00:00:23  989kN, tb=480
1.Rxa3 Rxa3+
  ³  (-0.70)   Depth: 12/27   00:00:32  1381kN, tb=826
1.Rxa3 Rxa3+ 2.Kxa3 Kf5 3.Kb4 Kxg5 4.h3 h5 5.Kc4 f5 6.Kd3 h4 7.g4 fxg4
  -+  (-2.41)   Depth: 12/27   00:00:35  1470kN, tb=1196
1.h4 Kf5 2.Ra1 Kg4 3.Ka2 Kxg3 4.Rh1 Ra6 5.Ka1 Kg4
  -+  (-2.31)   Depth: 12/31   00:00:56  2593kN, tb=1482
1.Kb4 Kf5 2.Kc5 Kxg5 3.Kb6 Ra8 4.Kb5 f5 5.Kc4 f4
  µ  (-1.34)   Depth: 12/31   00:01:56  5771kN, tb=1618
1.Re2+ Kf5 2.Ka2 Kxg5 3.h3 h5 4.Re4 f5 5.h4+
  µ  (-1.16)   Depth: 12/31   00:02:29  7442kN, tb=1793
1.Re2+ Kf5 2.Ka2 Kxg5 3.h3
  µ  (-1.16)   Depth: 13/31   00:03:29  10494kN, tb=2105

(Frohlick, MyTown 23.07.2002)



On July 23, 2002 at 12:26:23, Joachim Rang wrote:

>This position was posted by supermichi a few days ago:
>
>[D] 8/r3kppp/4b3/3BP3/5P2/p1K3P1/R6P/8 w - - 0 42
>
>After the moves:
>
>42.Lxe6 42...Kxe6 43.Kb3 g5 44.fxg5 Kxe5
>
>we reach this position:
>
>[D] 8/r4p1p/8/4k1P1/8/pK4P1/R6P/8 w - - 0 45
>
>where the right move is 45. Te2! which saves the draw. My question is, which
>programs find the right move in what time?
>Crafty 18.15 wants to play 45. Txa3? even after hours of analysis, which leads
>to a lost pawn endgame.
>
>Which programs find the right solution?



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