Tritzky line

The statement of the Troitsky line rule in the two knights v pawn ending that currently appears in Wikipaedia is, "For the position with White to move, Troitsky established that if a black pawn is securely blockaded (by one of the white knights) on a square no further forward than the line a4–b6–c5–d4–e4–f5–g6–h4, then White can win the resulting endgame (and similarly in reverse for Black), no matter where the other pieces are placed".
 
The adjective "securely" has been inserted after some discussion on the talk pages of the article (but without any further definition of the phrase "securely blockaded").

I would like to take a straw poll of how many people would say the new wording is now adequate to cover the following positions, which are all draws with either side to move.

Please say if you think the wording adequately covers all, some or none of the positions.

For "Tritzky" please read "Troitzky" or "Troitsky" - I can't see how to edit the topic title.