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Subject: Re: Hash effects on knowledge vs. search

Author: Robert Hyatt

Date: 20:23:17 11/15/97

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On November 15, 1997 at 21:06:27, Howard Exner wrote:

>
>>Could you post one or two of these?  THANKS!  :)
>
>5k2/8/7P/8/8/8/K6P/1B6 w
>
>I'm not sure if this is what you are looking for.
>The best move is Bh7 and for Rebel 8 the
>solution times vary significantly depending on the
>hash size.
>
>13MB = 4:14
>28MB = 3:09
>60MB = 0:51
>
>This on a K6-233.

This is either easy, or a mistake:
              depth   time  score   variation (1)
                1     0.03   0.00   h7 Kg7
                1     0.06   6.24   Bf5
                1->   0.06   6.24   Bf5
                2     0.06     --   Bf5
                2     0.06   0.00   Bf5 Kg8
                2     0.06   6.00   Bh7 Kf7
                2->   0.07   6.00   Bh7 Kf7
                3     0.10   6.20   Bh7 Kf7 Bf5
                3->   0.17   6.20   Bh7 Kf7 Bf5
                4     0.37   6.14   Bh7 Kf7 h4 Kf6
                4->   0.49   6.14   Bh7 Kf7 h4 Kf6
                5     0.50   6.34   Bh7 Ke7 h4 Kf7 Bf5
                5->   0.60   6.34   Bh7 Ke7 h4 Kf7 Bf5
                6     0.70   6.26   Bh7 Ke7 h4 Kf7 h5 Kf6
                6->   0.86   6.26   Bh7 Ke7 h4 Kf7 h5 Kf6
10     3.22   6.39   Bh7 Ke7 h4 Kf7 Ka3 Kf6 Kb3 Ke7 Bf5
                                    Kf7
               10->   4.00   6.39   Bh7 Ke7 h4 Kf7 Ka3 Kf6 Kb3 Ke7 Bf5
                                    Kf7
               11     4.81   6.57   Bh7 Ke7 h4 Kf7 h5 Kf8 Kb3 Kf7 Kc4
Kf6
                                    Bf5
               11->   6.03   6.57   Bh7 Ke7 h4 Kf7 h5 Kf8 Kb3 Kf7 Kc4
Kf6
                                    Bf5
               12     7.21   6.49   Bh7 Ke7 h4 Kf7 Kb3 Kf8 Kc4 Kf7 Kd5
                                    Kf6 Bf5 Kf7
               12->   8.95   6.49   Bh7 Ke7 h4 Kf7 Kb3 Kf8 Kc4 Kf7 Kd5
                                    Kf6 Bf5 Kf7
               13    10.56   6.61   Bh7 Ke7 h4 Kf7 Kb3 Kf8 Kc4 Kf7 Kd5
                                    Kf6 Bf5 Kf7 h5
               13->  12.76   6.61   Bh7 Ke7 h4 Kf7 Kb3 Kf8 Kc4 Kf7 Kd5
                                    Kf6 Bf5 Kf7 h5
                                    Kd5 Kf7 Ke5 Kf8 Bf5
               15->  28.92   6.65   Bh7 Ke7 h4 Kf7 Kb3 Kf8 Kc4 Kf7 h5
Kf8
                                    Kd5 Kf7 Ke5 Kf8 Bf5
               16    29.38     ++   Bh7!!
               16->  41.01   6.94   Bh7 Ke7 h4 Kf7 Kb3 Kf8 Kc4 Kf7 h5
Kf8
                                    Kd5 Kf7 Ke5 Kf8 Bf5
               17    41.65     ++   Bh7!!
               17->   1:10   7.23   Bh7 Ke7 h4 Kf7 Kb3 Kf8 Kc4 Kf7 h5
Kf8
                                    Kd5 Kf7 Ke5 Kf8 Bf5
               18     1:11     ++   Bh7!!
               18->   2:10   7.52   Bh7 Ke7 h4 Kf7 Kb3 Kf8 Kc4 Kf7 h5
Kf8
                                    Kd5 Kf7 Ke5 Kf8 Bf5

               14    17.29   6.46   Bh7 Ke7 h4 Kf7 Kb3 Kf8 Kc4 Kf7 h5
Kf8
                                    Kd5 Kf7 Ke5 Kf8
               14->  20.57   6.46   Bh7 Ke7 h4 Kf7 Kb3 Kf8 Kc4 Kf7 h5
Kf8
                                    Kd5 Kf7 Ke5 Kf8
               15    24.48   6.65   Bh7 Ke7 h4 Kf7 Kb3 Kf8 Kc4 Kf7 h5
Kf8

                7     0.91   6.46   Bh7 Ke7 h4 Kf8 h5 Kf7 Bf5
                7->   1.14   6.46   Bh7 Ke7 h4 Kf8 h5 Kf7 Bf5
                8     1.41   6.31   Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf6
                8->   1.86   6.31   Bh7 Ke7 h4 Kf8 h5 Kf7 Kb3 Kf6
                9     2.14   6.51   Bh7 Ke7 h4 Kf7 h5 Kf8 Kb3 Kf7 Bf5
                9->   2.75   6.51   Bh7 Ke7 h4 Kf7 h5 Kf8 Kb3 Kf7 Bf5


Sorry the above is out of order, but cutting/pasting in netscape is not
always easy.

But Bh7 seems obvious???

Bob



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