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Subject: Re: Hard pawn endgame?

Author: Chuck

Date: 06:19:01 11/17/05

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Interesting. Shredder 9.1 UCI with access to about 70 GB of tablebases (all
3-4-5 and some 6) gives the following analysis, which seems to shed no more
light on the position (1.h4 really seems to slow it down):

New game,
8/4k1p1/8/4KPp1/6P1/7P/8/8 w - - 0 1

Analysis by Shredder 9.1 UCI  UCI:

1.h4
  µ  (-1.10)   Depth: 1/2   00:00:00
1.h4
  ±  (1.33)   Depth: 1/2   00:00:00
1.Ke4
  +-  (2.97)   Depth: 1/2   00:00:00
1.Ke4
  +-  (2.97)   Depth: 1/2   00:00:00
1.Ke4 Kf6
  +-  (2.99)   Depth: 2/3   00:00:00
1.Ke4 Kf6
  +-  (2.72)   Depth: 3/4   00:00:00
1.Ke4 Kf6 2.Kf3
  +-  (2.72)   Depth: 3/4   00:00:00
1.Kd5
  +-  (2.79)   Depth: 3/5   00:00:00
1.Kd5 Kf6 2.Ke4
  +-  (2.79)   Depth: 3/5   00:00:00
1.Kd5 Kf7 2.Kd6 Kf6
  +-  (2.85)   Depth: 4/6   00:00:00
1.Kd4
  +-  (2.86)   Depth: 4/7   00:00:00
1.Kd4 Kf6 2.Ke4 g6
  +-  (2.86)   Depth: 4/7   00:00:00
1.Kd4 Kf6
  +-  (2.59)   Depth: 5/7   00:00:00
1.Kd4 Kf6 2.Ke4 g6 3.fxg6
  +-  (2.29)   Depth: 5/7   00:00:00
1.Kd4 Kf6
  +-  (2.60)   Depth: 6/7   00:00:00  1kN, tb=4
1.Kd4 Kf7 2.Kd3 Ke7 3.Ke3 Kf6
  +-  (2.89)   Depth: 6/7   00:00:00  1kN, tb=4
1.Kd5
  +-  (2.92)   Depth: 6/9   00:00:00  1kN, tb=7
1.Kd5 Kf7 2.Kd4 Kf6 3.Ke4 Ke7
  +-  (3.17)   Depth: 6/9   00:00:00  1kN, tb=7
1.Kd5 Kf7
  +-  (2.89)   Depth: 7/9   00:00:00  1kN, tb=15
1.Kd5 Kf7 2.Kd4 Ke7
  +-  (2.89)   Depth: 7/9   00:00:00  2kN, tb=17
1.Kd5 Kf7 2.Kd4 Ke7 3.Kd3 Kf7 4.Ke3 Kf6
  +-  (2.89)   Depth: 8/9   00:00:00  3kN, tb=27
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5
  +-  (2.89)   Depth: 9/10   00:00:00  5kN, tb=40
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5
  +-  (2.89)   Depth: 10/11   00:00:00  8kN, tb=56
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7
  +-  (2.89)   Depth: 11/13   00:00:00  12kN, tb=113
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Ke4
  +-  (2.89)   Depth: 12/14   00:00:01  16kN, tb=240
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7
  +-  (2.89)   Depth: 13/14   00:00:01  24kN, tb=392
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7
  +-  (2.89)   Depth: 14/16   00:00:01  35kN, tb=663
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd5 Ke7 7.Kd4 Kf7 8.Kd5
  +-  (2.89)   Depth: 15/17   00:00:02  52kN, tb=1016
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Ke4
  +-  (2.89)   Depth: 16/19   00:00:04  72kN, tb=1685
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7 7.Ke3 Kf7 8.Kd4 Ke7
9.Ke5 Kf7 10.Kd5 Ke7 11.Kd4 Kf7 12.Kd3 Ke7 13.Ke3 Kf7 14.Kd4
  +-  (2.89)   Depth: 17/22   00:00:04  102kN, tb=2268
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7 7.Ke3 Kf7 8.Kd4 Ke7
9.Ke5 Kf7 10.Kd5 Ke7 11.Kd4 Kf7 12.Kd3 Ke7 13.Ke3 Kf7 14.Kd4
  +-  (2.89)   Depth: 18/22   00:00:05  145kN, tb=3152
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3
  +-  (2.89)   Depth: 19/30   00:00:06  232kN, tb=4814
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7 7.Ke3 Kf7 8.Kd4 Ke7
9.Ke5 Kf7 10.Kd5 Ke7 11.Kd4 Kf7 12.Kd3 Ke7 13.Ke3 Kf7 14.Kd4
  +-  (2.89)   Depth: 20/30   00:00:07  327kN, tb=6040
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7
  +-  (2.89)   Depth: 21/30   00:00:09  445kN, tb=7282
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7 7.Ke3 Kf7 8.Kd4 Ke7
9.Ke5 Kf7 10.Kd5 Ke7 11.Kd4 Kf7 12.Kd3 Ke7 13.Ke3 Kf7 14.Kd4
  +-  (2.89)   Depth: 22/30   00:00:10  642kN, tb=9764
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7 7.Ke3 Kf7 8.Kd4 Ke7
9.Ke5 Kf7 10.Kd5 Ke7 11.Kd4 Kf7 12.Kd3 Ke7 13.Ke3 Kf7 14.Kd4
  +-  (2.89)   Depth: 23/30   00:00:11  985kN, tb=11901
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7
  +-  (2.89)   Depth: 24/30   00:00:13  1575kN, tb=13948
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7 7.Ke3 Kf7 8.Kd4 Ke7
9.Ke5 Kf7 10.Kd5 Ke7 11.Kd4 Kf7 12.Kd3 Ke7 13.Ke3 Kf7 14.Kd4
  +-  (2.89)   Depth: 25/36   00:00:16  3084kN, tb=16194
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7 7.Ke3 Kf7 8.Kd4 Ke7
9.Ke5 Kf7 10.Kd5 Ke7 11.Kd4 Kf7 12.Kd3 Ke7 13.Ke3 Kf7 14.Kd4
  +-  (2.89)   Depth: 26/40   00:00:20  6184kN, tb=17648
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7
  +-  (2.89)   Depth: 27/42   00:00:33  15325kN, tb=17963
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7 7.Ke3 Kf7 8.Kd4 Ke7
9.Ke5 Kf7 10.Kd5 Ke7 11.Kd4 Kf7 12.Kd3 Ke7 13.Ke3 Kf7 14.Kd4
  +-  (2.89)   Depth: 28/44   00:01:42  57848kN, tb=18315
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7 7.Ke3
  +-  (2.89)   Depth: 29/46   00:02:33  95008kN, tb=18998
1.Kd5 Kf7 2.Kd4 Ke7 3.Ke5 Kf7 4.Kd5 Ke7 5.Kd4 Kf7 6.Kd3 Ke7 7.Ke3
  +-  (2.89)   Depth: 30/48   00:03:57  155113kN, tb=20099
1.Kd5 Kd7 2.Kd4 Kd6 3.Ke4 Ke7
  +-  (2.89)   Depth: 31/58   00:08:33  379239kN, tb=26975

Note Shredder here is choosing a different move than Fruit, even after 30+ ply.

Cheers,

Chuck



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