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Subject: Re: Easy position with Crafty TB bug?

Author: Robert Hyatt

Date: 05:57:25 03/27/00

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On March 27, 2000 at 04:23:06, Bernhard Bauer wrote:

>On March 27, 2000 at 03:43:25, blass uri wrote:
>
>>On March 27, 2000 at 02:43:14, Bernhard Bauer wrote:
>>
>>>The following position is a study by M. Liburkin.
>>>[D]6bk/8/5P/p3PP/8/8/3K/8 w
>>
>>I think that your position is wrong
>>
>>The right position if I assume the main lines make sense is probably:
>>
>>8/8/8/6B1/3p4/4p3/5p1k/5K2 w - - 0 1
>>
>>I found for example that the white bishop has to be at g5 because the main lines
>>show that it can get to f4 and h4 and that it cannot be at g3 because if it was
>>at g3 then Bf4+ Kh1 is not possible.
>>
>>Uri
>
>Oops, my mistake, you are obviously right.
>The last position is from H. Weening, where I got different lines by Crafty.
>Hope to get a diagram.
>[D]8/8/8/6B1/3p4/4p3/5p1k/5K2 w - - 0 1
>Kind regards
>Bernhard


You have something broken.  Here is my output:
Crafty v17.11 (1 cpus)

White(1): max threads set to 4
White(1): st=9999
search time set to 9999.00.
White(1): hash=192m
hash table memory = 192M bytes.
White(1): 8/8/8/6B1/3p4/4p3/5p1k/5K2 w
White(1): move
end-game phase
              clearing hash tables
              time surplus   0.00  time limit 166:39 (166:39)
         nss  depth   time  score   variation (1)
starting thread 1
starting thread 2
starting thread 3
         (4)   17->   1.19   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   18     1.19   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   18->   1.34   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   19     1.35   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   19->   1.42   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   20     1.43   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   20->   1.50   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   21     1.50   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   21->   1.59   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   22     1.59   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   22->   1.70   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   23     1.71   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   23->   1.94   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   24     1.95   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   24->   2.06   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   25     2.06   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   25->   2.13   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   26     2.13   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   26->   2.23   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   27     2.23   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   27->   2.35   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   28     2.35   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   28->   2.65   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   29     2.82   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   29->   2.94   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   30     2.95   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   30->   3.03   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   31     3.04   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   31->   3.17   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   32     3.18   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   32->   3.48   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   33     3.53   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   33->   3.68   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   34     3.69   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   34->   3.80   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   35     3.81   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   35->   4.08   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   36     4.09   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   36->   4.53   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   37     4.53   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   37->   4.68   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   38     4.68   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   38->   4.85   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   39     4.85   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   39->   4.99   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   40     5.00   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   40->   5.18   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   41     5.19   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   41->   5.33   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   42     5.34   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   42->   5.55   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   43     5.56   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   43->   5.72   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   44     5.73   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   44->   5.91   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   45     5.92   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   45->   6.09   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   46     6.10   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   46->   6.29   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   47     6.30   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   47->   6.50   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   48     6.50   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   48->   6.69   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   49     6.70   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   49->   6.88   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   50     6.88   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   50->   7.07   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   51     7.08   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   51->   7.26   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   52     7.27   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   52->   7.45   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   53     7.46   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   53->   7.68   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   54     7.69   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   54->   7.87   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   55     7.87   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   55->   8.05   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   56     8.06   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   56->   8.27   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   57     8.28   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   57->   8.47   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   58     8.47   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   58->   8.70   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   59     8.71   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   59->   8.92   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (3)   60     8.93   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
         (4)   60->   9.12   0.00   1. Bh4 Kh3 2. Bxf2 <HT>
              time=9.12  cpu=261%  mat=0  n=5558187  fh=99%  nps=609450
              ext-> checks=108993 recaps=322 pawns=7948 1rep=7181 thrt:0
              predicted=0  nodes=5558187  evals=3817
              endgame tablebase-> probes done=9227  successful=1322
              SMP->  split=49083  stop=0  data=27/64  cpu=23.86  elap=9.12

White(1): Bh4


You likely have a corrupted kppkb tablebase, as crafty sees that the kpp vs kb
is a dead draw here...



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