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Subject: Re: Why is this type of endgame position still so difficult??

Author: Robert Hyatt

Date: 07:56:57 06/11/01

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On June 11, 2001 at 01:31:14, Jouni Uski wrote:

>[D]8/4k3/2K5/6p1/6B1/7P/8/8 w - -
>
>I tested this simple draw position with 3 engines:
>Fritz5      +4,53 no TBs
>Goliath     +3,39 no TBs
>Crafty18.7  +5,01 with 4 piece TBs
>
>Hmm. Should this already be solved poblem?
>
>Jouni


It _is_ a solved problem. I don't know where that 5.01 is coming
from.  Here is output from crafty:

                3     0.02   0.00   1. Kd5 Kf6 2. Bc8
                3->   0.02   0.00   1. Kd5 Kf6 2. Bc8
                4     0.03   0.00   1. Kd5 Kf6 2. Bc8 Kg6
                4->   0.04   0.00   1. Kd5 Kf6 2. Bc8 Kg6
                5     0.04   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7
                5->   0.05   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7
                6     0.06   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7 Kf6
                6->   0.09   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7 Kf6
                7     0.10   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7 Kf6 4.
                                    Be8
                7->   0.20   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7 Kf6 4.
                                    Be8
                8     0.22   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7 Kh7 4.
                                    Be8 Kh6
                8->   0.34   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7 Kh7 4.
                                    Be8 Kh6
                9     0.44   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7 Kf6 4.
                                    Be8 Kg7 5. Ke5
                9->   1.02   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7 Kf6 4.
                                    Be8 Kg7 5. Ke5
               10     1.17   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7 Kf6 4.
                                    Be8 Kg7 5. Ke5 Kh7
               10->   1.64   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7 Kf6 4.
                                    Be8 Kg7 5. Ke5 Kh7
               11     2.46   0.00   1. Kd5 Kf6 2. Bc8 Kg7 3. Bd7 Kf6 4.
                                    Be8 Kg7 5. Ke5 Kh8 6. Kf5


Don't know what that score is coming from...  Perhaps the version
you have has a bug of some sort.  18.10 at least doesn't have this problem,
and I haven't changed anything recently in this area that I know of...



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