Author: Paul Byrne
Date: 21:24:00 01/15/04
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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
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