[Bug-gnubg] Question to the Position-ID

[Frank Berger]

> GNU Backgammon  Position ID: rwEAAO62gQIEAA
>                  Match ID   : 8ImmAEAAEAAA
>  +13-14-15-16-17-18------19-20-21-22-23-24-+     O: oooo
>  | X                |   |       X  O  O  O | OO  4 points
>  |                  |   |          O     O | OO
>  |                  |   |                O | OO
>  |                  |   |                O | O
>  |                  |   |                  | O
> v|                  |BAR|                  |     5 point match (Cube: 
> 1)
>  |                  |   |                  |
>  |                  |   |                  |
>  |                  |   |          X  X    |
>  |                  |   | X  X  X  X  X    |     Rolled 51
>  | X                |   | X  X  X  X  X    |     2 points
>  +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: You


Before I looked at the score, I entered the Position-ID and Match-ID in 
BGBlitz and was astonished that not X is on but O.... I fetched 
http://www.cs.arizona.edu/~gary/backgammon/positionid.html

found:
>>>>>>>>>>>>
As an example, here's what the starting position looks like in the key 
format:
 0 0 0 0 0          # player on roll has no chequers on ace to 5 points
>>>>>>>>>>>>

"player on roll" are the key words for me.

I started the debugger and the decoded position ID started with 
111101011 (least signifikant bit first) but that are obviously O's 
checkers  not X who's turn it is, what is in contradiction to the 
position. Turning who's on to O brings as first byte 01110111 (again 
written with least signifikant bit first) .
It looks to me that the position ID starts with the bits for the player 
*not* on turn.

Did I overlook something?
Any clarification appreciated.

ciao
Frank

P.S. what scares me a little is that I'm pretty sure that I had working 
code at some time, but in my current examples always the wrong player 
is on....