Two simple extensions to WGOSA notation would allow us to describe
1. We could write an initial Weeds position with n spots as nW, to
show that the game of Weeds rather than Sprouts is intended.
2. We could write 1()6 to designate a move that connects spots 1 and
6, but without adding a new spot on the line. All the old moves are
still valid, so 1(7)6, for example, means the same thing it always has.
Aunt Beast has calculated the misere Grundy numbers for Weeds
positions with up to 6 initial spots:
G-(1W) = 1
G-(2W) = 3
G-(3W) = 3
G-(4W) = 3
G-(5W) = 4
G-(6W) = 0
 Mentioned at http://en.wikipedia.org/wiki/Sprouts_(game)