Author: Les Fernandez

Date: 23:32:49 11/10/99

Go up one level in this thread

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. Thanks. BTW if anyone out here is interested in the other thread discussing other suggestions let me know and I will post it. Les

- Re: Counting & Encoding Any Chess Position in 157 bits
**Ratko V Tomic***19:47:25 11/11/99* - Re: Counting & Encoding Any Chess Position in 157 bits
**blass uri***00:47:19 11/11/99*- Re: Counting & Encoding Any Chess Position in 157 bits
**KarinsDad***14:44:22 11/11/99*- Re: Counting & Encoding Any Chess Position in 157 bits
**Les Fernandez***07:29:37 11/12/99* - Re: Counting & Encoding Any Chess Position in 157 bits
**Les Fernandez***00:20:26 11/12/99*

- Re: Counting & Encoding Any Chess Position in 157 bits
- Re: Counting & Encoding Any Chess Position in 157 bits
**Les Fernandez***07:17:40 11/11/99*

- Re: Counting & Encoding Any Chess Position in 157 bits

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