Re: [Bug-gnubg] 2 problems

[Joern Thyssen]

On Fri, Aug 02, 2002 at 10:09:00PM +0200, max-d wrote
> Hi
> gnubg-020730
> 
> 1//
> 
> Its own luck rates are <0 here :
> 
> Luck rate (total)  -0,609 ( +4,151%) -1,474 (-52,240%)
> Luck rate (pr. move)  -0,008 ( +0,054%) -0,019 ( -0,670%)
> 
> Luck rating:   None             None

What is the problem?

The first number (-0.609) is normalised luck whereas the number in
parentheses is luck measured in match winning chance.

If you roll a -0.200 joker in the first game of a 3-point match it'll
give a luck rate of

equity -0.200
mwc    -1.97% 

If you roll a +0.100 joker in DMP this gives you a luck rate of

equity +0.100
mwc    +5.00%

Your total luck rate is:
equity -0.100
mwc    +3.03%

That is, a negative luck rate measured in equity and a positive one
measured in mwc.

In general, (player 0 skill + player 0 luck) - (player 1 skill + player
1 luck) should sum up to the result of the game; 100% if player 0 wins,
0% otherwise.

> 3 point match
> Program (expert level) had made a wrong double
> here i did redouble.
> It says *Proper cube action: Redouble, take* but *No double* and
> *Double, take* got the same notation .
[snip]
>  GNU Backgammon  Position ID: 4PeBBwDMTuKAEQ
>                  Match ID   : URFgABAAAAAA
[snip]
> Cube analysis
> 2-ply cubeless MWC  29,90%
>   0,394 0,077 0,001 - 0,606 0,070 0,001
> 1. Double, take         39,42%
> 2. Double, pass         70,00%  (+30,58%)
> 3. No double            39,42%  ( +0,00%)
> Proper cube action: Redouble, take
> Move number 14: X to play 33

'user' has a automatic redouble as he is down 0-1 in a three point
match.

gnubg's take point is 30%. However, gnubg thinks that no sequence takes
'user' below 30%, so 'user' can double now or double on next roll. 
Technically, it is a redouble, but since there is no market losers it
doesn't cost anything to wait.

Jørn

-- 
Joern Thyssen, PhD
Vendsysselgade 3, 3., DK-9000 Aalborg, Denmark
+45 9813 2791 (private) / +45 2077 2689 (mobile) / +45 9633 7036 (work)