Re: [Bug-gnubg] Analyse -> Market Window question?

[Massimiliano Maini]

On 9 June 2013 15:34, sebalotek <address@hidden> wrote:

> I've attached another example from my practice game today -
> If I'm reading the screenshot correctly my Take Point for the offered cube
> should be above 30.079.
> My Current win percentage =  31.0%.
>
> So why is it classified as 'Bad' when I do Take at this stage? Is it me
> being n00by again or is this a bug?
>
> <http://gnu-backgammon.996308.n3.nabble.com/file/n6714/gnubg_cube_market_05.jpg>
>
> <http://gnu-backgammon.996308.n3.nabble.com/file/n6714/gnubg_cube_market_04.jpg>

Hi,
notice that on your screenshot you actually have two takepoints: dead cube
at 37% and fully live at 30%. Your real take point is somewhere between the
two.

As said by Ian, gnubg uses Janowski's formulas for cubeful equities and these
try to estimate the equity considering the "real' cube liveliness, which is
between "dead cube" and "fully live cube".

They are called "market windows" because the real take point (or other point)
lies somewhere in the range they show.

I think that mostly the market windows are (by advanced/expert players) to
understand how the window changes depending on the score: at some scores
the window is huge, at some others it's tiny.

Max.