qusar: This is indeed a situation where the one having the prime should unblock but it is a different position of pieces. You don't have to just be in a column, but you must NOT have a chance to move in order someone to unblock you
(hide) If you want to find an opponent with similar playing skills to your own look in the Ratings page of the type of game you want and find a player with a similar BKR. (pauloaguia) (show all tips)