[Computer-go] Game 2 goes to Zen: 1-1

["Ingo Althöfer"]

Hi Darren,

I think, I an also answer your questions on the charts.

> > Winning percents for White, as seen by "Many Faces of Go"
> > http://www.althofer.de/zen-tromp-02-percents.jpg
> > 
> > Territory estimates for White, as seen by ManyFaces
> > http://www.althofer.de/zen-tromp-02-territory.jpg
> ... 
> David, what is the territory chart saying? Is it based on playouts (i.e.
> based on terminal positions), or is it counting the current board
> position (i.e. as if both players were to pass)?

No playouts at all involved. "Territory"
is just counting the current board position in the traditional
pre Monte-Carlo way. It is one of the nice old MF-10 features within 
ManyFaces, and thanks to David for leaving them in the code. 
It is quite typical that the fluctuations in Territory are much larger than 
in the relevant part of the Monte-Carlo percent chart.

> (The territory charts says 15pts to black, with 52-55% to white at
> around move 45; then says 40pts to white, with about 52% to white at
> move 80.)
 
The two charts are generated completely independently of each other.
(This independence gives additional information especially to experienced
users.) In the Monte-Carlo percent diagram each data point stems from 1,000
random games starting at the corresponding position.
For reasons of computational speed only every third position is evaluated:
after moves 3, 6, 9, 12, ... The positions after moves of Black are related
to black dots, the others after moves of White. 

It is a bit strange that ManyFaces generates rather large fluctuations for
the very first data points. Perhaps it would make sense to start the data 
points only at move 20 or so (David, do you hear me?). For me it would be 
also nice to have an option computing the % not only for every third but for
every position in the game.

Regards, Ingo.
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