Author: Michel Langeveld
Date: 09:18:14 06/18/99
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On June 17, 1999 at 19:06:49, Dann Corbit wrote: >On June 17, 1999 at 19:01:31, Dann Corbit wrote: > >>On June 17, 1999 at 17:30:00, Dann Corbit wrote: >> >>>We all know that move generators can tell us how many legal moves exist in the >>>first <n> ply if written correctly. Here is a new kind of question about it: >>>How many "distinct/unique" positions are there in the first n ply? >>>Some answers: >>> >>>Ply: Number: >>>---- ------- >>>0 1 >>>1 20 >>>2 400 >>>3 7,602 >>>4 101,236 >> 5 1,244,216 >Interesting how much ply 5 is reduced (from 4,865,609 raw positions). The >reduction should be [in fact] MUCH GREATER, since most of the e.p. tags have no >effect at this point. Dann good point!! I shall try to help whatever is possible. I hope to finish today a full 9 ply search :-)))). I think the value of positions with epfield counted as different when the epfield can't be hit is not valuable. A position after: 1 e4 e5 2 d4 is the same as 1 d4 e5 1 e4 Do you have counted this as different?? Also castlingrights (KQkq) should be counted as different. A position after 1 e3 e6 2 Ke2 Nf6 3 Ke1 Ng8 is different as: 1 e3 e6 2 Cheers!! Michel Langeveld (rudolf@stad.dsl.nl)
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