Author: Robert Hyatt
Date: 18:13:28 01/14/98
Go up one level in this thread
On January 14, 1998 at 17:47:04, Bruce Moreland wrote:
>
>On January 14, 1998 at 17:31:10, Stuart Cracraft wrote:
>
>>Reti composed a famous endgame study with two outside
>>passed pawns. I forget the position. It seems like,
>>for limited search, it might be good for some types
>>of tests.
>>
>>If you know it, please post it, along with your solution
>>time both with and without hashtable, if possible.
>
>7K/8/k1P5/7p/8/8/8/8 w - - 0 1
>
>White to play and draw, solution is 1. Kg7, and this is easy.
>
>bruce
two ways to solve it. First with endgame databases: :)
depth time score variation (1)
1 0.09 -Mat14 c7 <EGTB>
1 0.09 ++ Kg8!!
1 0.09 -7.48 Kg8
1-> 0.09 -7.48 Kg8
2 0.09 -- Kg8
2 0.09 -Mat13 Kg8 <EGTB>
2 0.09 -Mat14 c7 <EGTB>
2 0.09 ++ Kg7!!
2 0.09 0.00 Kg7 <EGTB>
2-> 0.10 0.00 Kg7 <EGTB>
and without:
depth time score variation (1)
1 0.00 -7.28 c7 Kb7
1-> 0.01 -7.28 c7 Kb7
2 0.02 ++ c7!!
2-> 0.04 -6.99 c7 Kb7
3 0.05 -- c7
3 0.07 -9.18 c7 Kb7 c8=Q+ Kxc8 Kg8
3 0.08 ++ Kg8!!
3 0.09 -7.34 Kg8 h4 c7 Kb7
3-> 0.10 -7.34 Kg8 h4 c7 Kb7
4 0.12 -- Kg8
4 0.13 -9.18 Kg8 Kb6 Kf7 Kxc6
4 0.15 ++ Kg7!!
4 0.16 -7.57 Kg7 Kb6 Kg6 h4
4-> 0.17 -7.57 Kg7 Kb6 Kg6 h4
5 0.18 -7.34 Kg7 Kb6 Kg6 h4 c7
5-> 0.20 -7.34 Kg7 Kb6 Kg6 h4 c7
6 0.22 -7.42 Kg7 Kb6 Kf6 h4 Ke5 h3 c7
6-> 0.23 -7.42 Kg7 Kb6 Kf6 h4 Ke5 h3 c7
7 0.26 -7.45 Kg7 Kb6 Kf6 h4 Ke5 h3 Kd6 Ka6
7-> 0.27 -7.45 Kg7 Kb6 Kf6 h4 Ke5 h3 Kd6 Ka6
8 0.36 ++ Kg7!!
8 0.41 -7.02 Kg7 Kb6 Kf6 h4 Ke5 h3 Kd6 Ka6 c7 Kb7
8-> 0.43 -7.02 Kg7 Kb6 Kf6 h4 Ke5 h3 Kd6 Ka6 c7 Kb7
9 0.52 ++ Kg7!!
9-> 0.57 -6.73 Kg7 Kb6 Kf6 h4 Ke5 h3 Kd6 Ka6 c7 Kb7
10 0.68 ++ Kg7!!
10 0.89 -0.03 Kg7 Kb6 Kf6 h4 Ke5 h3 Kd6 Ka7 Kd7 h2
c7 h1=Q c8=Q Qd5+ Ke7
10-> 0.94 -0.03 Kg7 Kb6 Kf6 h4 Ke5 h3 Kd6 Ka7 Kd7 h2
c7 h1=Q c8=Q Qd5+ Ke7
11 1.44 0.00 Kg7 Kb6 Kf6 h4 Ke5 h3 Kd6 h2 c7 h1=Q
c8=Q Qd1+ Ke7 Qd2 Qd7 Qxd7+ Kxd7
the above is on my notebook with a small default hash
table...
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