Does Gnu Backgammon "understand" the properties of type setup from the SGF format ? In the description of Gnu Backgammon's use of SGF at
there is no mention of eg. the properties AB and AW for adding checkers, and using them in a nearly empty .sgf file, seems not to change things from the starting position.
I am considering using SGF as the main format for files produced by a tool, but probably only if the resulting files can be understood by gnubg.