Re: [Bug-gnubg] The match and game data structure

[Jim Segrave]

On Mon 03 Jul 2006 (11:38 +0100), Ian Shaw wrote:
> 
> Jim Segrave Sent: 30 June 2006 16:11
> > 
> > Along with this, move the analysis and rollout contexts, if 
> > any analysis or rollout is done to the match header. I think 
> > few analysed matches have more than a single analysis context 
> > or rollout context used, 
> 
> I don't think this is correct (but maybe I misunderstand your point). I know 
> people who will perform a quick 0-ply rollout, and then maybe follow it up 
> with a 2-ply rollout on the most likely candidates.
> 
> Similarly, I often analyse a whole match on 0-ply, then look at some plays at 
> 2-ply or higher.
> 
> Tutor mode is another example where one might use the tutor at 0-ply, but you 
> might sometimes ask for higher ply analysis.

Sure, but then all the analysis is either 0 ply evalutation, 2 ply
evaluation or one of two rollout contexts. In all, any data on a
particular move uses only one of 4 possible contexts. In a 21 point
match, we currently store perhaps 800 or so analysis contexts and
output those 800 contexts to the .sgf file. I'm proposing you store
and output only 4 contexts, then 800 moves with a simple index to the
analysis context which is applicable. 

-- 
Jim Segrave           address@hidden