[Bug-gnubg] Missed doubles problem ?

[Massimiliano . Maini]

Hi all,
I'm using GNUBG (WinXP) 0.14-devel build 030821.

I've analyzed a game (part of a 7pts match) and in the game stats I have :

                                      gnubg                MaX
Missed doubles around DP              0                    1 (-0,078, -0,910%)
Missed doubles around TG              0                    4 (-0,041, -0,476%)

Now the only marked cube decisions I can find (using the game record and
annotation windows, desperatly needing the integrated GUI !!) are the
following two (both in game 7, moves 8 and 9) :

Cube analysis
2-ply cubeless equity  +0,908 (Money:  +0,840)
   85,2%  14,9%   0,1% -  14,8%   1,3%   0,0%
Cubeful equities:
1. Double, pass         +1,000
2. Double, take         +1,180  ( +0,180)
3. No double            +0,959  ( -0,041)
Proper cube action: Double, pass

Cube analysis
2-ply cubeless equity  +0,855 (Money:  +0,796)
   83,9%  12,9%   0,2% -  16,1%   1,3%   0,0%
Cubeful equities:
1. Double, pass         +1,000
2. Double, take         +1,070  ( +0,070)
3. No double            +0,922  ( -0,078)
Proper cube action: Double, pass

What's going on here ?!
Aren't these 2 missed doubles around DP ?!
Also note how the equity differences in the stats (-0.078 and -0.041) are
exactly the equity differences of the two moves !

Problem in the problem, saving and reloading the game (.sgf), the stats read :

                                      gnubg                MaX
Missed doubles around DP              0                    1 (-0,078, -0,911%)
Missed doubles around TG              0                    1 (-0,041, -0,476%)

Now the count looks ok (!!++), but I still cannot understand why one of the
two is considered as a 'Missed double around TG'.
The count problem can be reproduced : load the game (saved without any
analisys), then analyze it and get the strange count (1 missed around DP,
4 missed around TG). Now save the game, reload it and the count now says
1 missed around DP, 1 missed around TG.
Somebody should be able to look into that, email me if you need the game file.

In fact, I also have a saved game (part of another 7pts match) where the game
stats are :

                                      gnubg                MaX
Missed doubles around DP              0                    3 (-0,178, -1,137%)

while in Game record/Annotation window I can only find this marked cube
decision :

Cube analysis
2-ply cubeless equity  +0,377 (Money:  +0,370)
   61,4%  23,7%   0,8% -  38,6%  10,0%   0,4%
Cubeful equities:
1. Double, take         +0,890
2. Double, pass         +1,000  ( +0,110)
3. No double            +0,764  ( -0,127)
Proper cube action: Double, take

This time, the equity difference is not the same and, also, the count doesn't
change saving and reloading the game.

MaX.