In this section, note the following:
Obstructed means a structure blocks view if pitcher, batter, or space in between.
Infield obstructed means a structure blocks view of any base or space within the diamond.
CF videoboard obstructed means a structure blocks the jumbo centerfield videoboard, the most important and informative video board in the park.
Superior means no poles block any part of the field, including grass in foul territory. These are the choicest grandstand seats.
Foul poles are not considered obstructions.
Degrees of obstruction are open to interpretation. I have sat in the seats to see the view of the field and scoreboard without leaning sideways into adjacent spaces, leaning forward or back, or ducking down. In some seats deemed Obstructed it is sometimes possible to peer around poles. And in some the pole is between pitcher and batter but doesn't technically block either; to me this is unacceptable so I call them Obstructed. In the back rows of the Grandstand, the poles are narrow due to perspective, so they don't block much of an angle. Still, they are distracting.
My seating charts are more conservative than the official Red Sox Obstructed View designations; in other words, many of the seats I call Obstructed are NOT judged to be Obstructed by the Red Sox, and the tickets of those seats are NOT marked Obstructed View.
Similarly, some unobstructed seats provide views in which the catcher or umpire is obscured but the batter and home plate are visible.