Author: Les Fernandez
Date: 07:17:40 11/11/99
Go up one level in this thread
On November 11, 1999 at 03:47:19, blass uri wrote: >On November 11, 1999 at 02:32:49, Les Fernandez wrote: > >>On November 10, 1999 at 03:25:28, Ratko V Tomic wrote: >> >>>Errata: >>> >>>> >>>> 3.6 Castle state was not included in the count, but it was estimated >>>> that it would add less than 0.13 bits to the position code, in >>>> the worst case (check earlier discussion on king pair + castle >>>> status encoding in 12 bits). The ep status also wasn't encoded, >>>> but since there could be at most 4 ep capture targets (white >>>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ >>>> assumed to move, thus 4 targets are black pawns on the 5-th rank), >>>> ^^^^^^^^^ >>>> the ep would add at most log2(5)=2.32 bits >>> ^^^^^^^^^^^^ >>> >>>This should say: "at most 5 ep capture targets" (e.g. the 5th rank could >>>be: pPppPppP with 5 black potential targets & 3 white pawns capable of >>>capturing any of the 5). Thus the code addition is log2(6)=2.58 bits. >>>This addition of 0.26 bits still doesn't bring the full position code >>>above the 157 bits. >> >>Hello Ratko, >> >>Listen I have been following this very interesting thread since it started and >>am involved in another thread which has also generated some interest. Appears >>to be some different ideas then what I have seen here. One of the gentlemne is >>interested in max of promoted pieces. ie I remembered seeing the thread that >>you can have 8 queens of one color and 4 of the other. Can someone tell me what >>the max #'s are for rooks, knights and bishops. > >The max number of promoted pieces is 8 for both sides(queens,rooks,bishops or >knights) > >Every capture of a piece can generate 2 passed pawns(1 white and 1 black) and >there are 14 pieces in the initial positions except kings(7 white and 7 black) >so it is not a problen to capture 8 of them. > >Uri > > Thanks. BTW if anyone out here >>is interested in the other thread discussing other suggestions let me know and I >>will post it. >> >>Les Thank you Uri I do appreciate the info
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