Author: Andreas Stabel
Date: 03:00:22 01/16/04
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On January 16, 2004 at 03:34:02, Andreas Stabel wrote: >On January 16, 2004 at 00:24:00, Paul Byrne wrote: > >>On January 15, 2004 at 04:30:59, Andreas Stabel wrote: >> >>>On January 12, 2004 at 22:07:26, Paul Byrne wrote: >>> >>>>Here are my results on the number of unique positions (note the en passant file >>>>was only set if there is a *legal* en passant capture on the next ply): >>>> >>>>1 20 >>>>2 400 >>>>3 5,362 >>>>4 72,078 >>>>5 822,518 >>>>6 9,417,681 >>>>7 96,400,068 >>>>8 988,187,354 >>>> >>>My program that calculates total number of unique positions encountered on all >>>plys to a certain depth gives: >>>1, 21, 421, 5783, 77796, 898812, 10281862, 106193643 >>> >>>Which - if you subtract gives the numbers: >>>1, 20, 400, 5362, 72013, 821016, 9383050, 95911781 >>> >>>As you can see theese numbers do not match yours from ply 4 and onwards. >>>So where is the error ? >> >>Some positions will occur at multiple depths in my list... the initial position >>at 4 ply after Nc3 Nc6 Nb1 Nb8, for example. >> >>-paul > >Thanks for clearing that up. >I think I will change my program so I can check you numbers. > >Regards >Andreas For the record: I've now modified my program and have checked your numbers to ply 7. When I get som time I will generate ply 8 and probably 9 too. Regards Andreas
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