Author: Ratko V Tomic

Date: 00:25:28 11/10/99

Go up one level in this thread

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.

- Re: Counting & Encoding Any Chess Position in 157 bits
**Les Fernandez***23:32:49 11/10/99*- 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

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

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