[computer-go] SGF-Questions

[Chrilly]

a) If one setups a position. Is there a property for the number of white and 
black captured stones so far.
b) There is the property AE. The list of empty points. Is it necessary to 
setup also the empty points or is it sufficient to setup only the the black 
and white stones with AB and AW?
c) if one setup-ups a position and there is no KO-Point. Is it necessary to 
specifiy a non-existing KO-Point (e.g. as KO[tt] or KO[] ) or has one to 
setup the KO only if there is a "real" KO-Point.

I assume a new GameTree. I want to setup a (tactical) test position on the 
GUI and then save it in an sgf-file (and retrieve it later).

Chrilly