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Subject: Re: Why is this position so difficult to the most programs?

Author: Dusan Dobes

Date: 22:11:59 08/11/98

Go up one level in this thread


On August 11, 1998 at 07:52:37, Robert Hyatt wrote:

>On August 11, 1998 at 00:32:36, blass uri wrote:
>
>>
>>On August 10, 1998 at 20:48:24, Jouni Uski wrote:
>>
>>>wKh2,Ba5,Ra2,Pg2,h3/bKh4,Qc8,Pg6,h5
>>>white to move
>>>solution Rc2!!
>>>
>>>In my P90 Fritz5, Rebel9, Nimzo98 and CM5000 cannot find solution in 30
>>>minutes, but there's exception: Mchess 7 finds it in 8'20''. How about
>>>yours - I quess Chess Tiger solves this in one second...
>>
>>Junior5 as an engine for fritz5 solved this position after 3 minutes in my
>>P200MMX
>>
>>Uri
>>>
>>>Jouni
>
>
>Here is crafty, running on my quad-p6 machine:  It finds a draw at 16
>seconds, Rc2 at 1:53 (1 min 53 secs, not 1 hour 53 minutes.. :)  )
>

Phalanx XVII on a pentium/150, 6MB hash table finds Rc2 in 13 minutes 52 s.

  7 ->   0:58.61  1177550
  8    -89  9533  1916791  Pg2-g3  Kh4-g5  Ra2-f2  Kg5-h6  Ba5-d2  Kh6-h7
                           Bd2-e3  Qc8-c6  Be3-d4
  8 ->   3:00.69  3700572
  9   -112 33441  6714773  Pg2-g3  Kh4-g5  Ra2-f2  Kg5-h6  Ba5-d2  Kh6-g7
                           Bd2-g5  Qc8-e6  Bg5-f6  Kg7-h6  Bf6-d4  Qe6-e4
  9   -107 83174 16315340  Ra2-c2  !
  9    -52 92549 18381210  Ra2-c2  !!
  9    371 95709 19212544  Ra2-c2  Qc8xc2  Ba5-d8  Pg6-g5  Bd8-a5  Qc2-e2
                           Ba5-c7  Qe2-f2  Bc7-d6  Qf2-g1  Kh2xg1
  9 ->  15:58.70 19247570
 10    383 96179 19307152  Ra2-c2  Qc8xc2  Ba5-d8  Pg6-g5  Bd8-a5  Qc2-f2
                           Ba5-c7  Qf2-g1  Kh2xg1  Pg5-g4  Ph3xg4  Kh4xg4
                           Bc7-e5
 10 ->  32:44.86 42267664
 11    379 197246 42429972  Ra2-c2  Qc8xc2  Ba5-d8  Pg6-g5  Bd8-a5  Qc2-f2
                           Ba5-c7  Qf2-g1  Kh2xg1  Pg5-g4  Kg1-h2  Pg4xh3
                           Pg2xh3
interrupted
search aborted
Depth=11, Value=379, Time=2050.37, Last turn=831.74, Nodes=44398735, N/s=21654
PV = Ra2-c2  Qc8xc2  Ba5-d8  Pg6-g5  Bd8-a5  Qc2-f2  Ba5-c7  Qf2-g1
     Kh2xg1  Pg5-g4  Kg1-h2  Pg4xh3  Pg2xh3



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