[jaybird]

Originally Posted by ajmc

Perhaps you could share your superior knowledge, with us less attuned, and explain just what a "PSK window" is, much less than when it "opens", and what it matters?

Be glad to. Scroll up to post number 17 which answered the question.

Definitions!

Quote:
2-16-2h
Post-scrimmage kick — a foul by R (other than illegal substitution or participation)
when the foul occurs:
1. During scrimmage kick plays, other than a try or successful field goal.
2. During a scrimmage kick play in which the ball crosses the expanded
neutral zone.
3. Beyond the expanded neutral zone.
4. Before the end of a kick.
5. And K will not be next to put the ball in play.
Quote:
2-38
Scrimmage is the action of the two teams during a down which begins with a snap.