Re: [Bug-gnubg] None

[Joern Thyssen]

On Mon, Jan 06, 2003 at 10:46:43AM -0500, Hanley Hayes wrote
> 
> 1. Game 1.  Move 23.  I have one checker on my one point and one checker on 
> my two point.  GNU has one checker on his six point and is on roll.  He 
> rolls 52 and wins the game.  Move is marked as "lucky".  As I see it, the 
> only rolls that wouldn't win immediately for GNU are 11, 12, 21, 13, 31, 
> 14, 41, 23, 32 or 9/36.  Why is a 27/36 roll marked as "lucky"?

In money game gnubg's equity is 27/36 * 1 - 9/36 * 1 =  +0.500.

gnubg rolls a 52 which has equity +1, so the roll has a net luck of
+0.5. gnubg considers a roll lucky if it improves your equity within
+0.3 and +0.6, hence the roll is considered "lucky".

Some time ago we discussed alternative ways to calculate the luck
rating, but nothing was decided upon.

Jørn