Sadaharu: @caranthir I see I get what you mean now. I didn't know there's such a restriction. No wonder the problem doesn't' compile properly sometimes. I'll take note for future problems.
caranthir: Removed one variation to make the tree legal.
caranthir: [Sadaharu: What do you mean?] There was one leaf with two branching parent nodes of white (opponent) moves, which does not usually compile in the webserver but fails to show the position (see admin guide; player's moves can instead branch indefinitely). I'll put the old sgf for reference and if you prefer to have it modified in some other way instead.
Resolved.