Add "garbage time" filter

[Alex-At-Home]

(could replace the walk-on filter for now, since it accomplishes basically the same thing)

Have a look at what people are defining as garbage time, but something like:

• 20 points with <=2 mins remaining
• 30 points with <= 3? mins remaining?

[Alex-At-Home]

Some notes:

https://kenpom.com/blog/the-simplest-proof-that-overtime-data-is-useful-and-that-garbage-time-exists/

18pts with 5 mins remaining ... seems a little aggressive 15pts with 2 mins remaining

[Alex-At-Home]

The one Torvik uses ... http://www.slate.com/articles/sports/sports_nut/2008/03/the_lead_is_safe.html

• Take the number of points one team is ahead. Subtract three.
• Add a half-point if the team that is ahead has the ball, and subtract a half-point if the other team has the ball. (Numbers less than zero become zero.)
  • (assume other team has ball)
• Square that.
• If the result is greater than the number of seconds left in the game, the lead is safe.

So 18 points would be 275 seconds ie 4m15s (better I think) 15 points would be 144 seconds 2m24s

Maybe limit to last 5 minutes regardless?

[AlexP-Elastic]

This seems to work:

def diff = doc["score_info.start_diff"].value;
def abs_diff = Math.abs(diff) - 0.5;
def diff_to_sq = abs_diff >= 0.0 ? abs_diff : 0.0;
def diff_sq = diff_to_sq*diff_to_sq;
// (OT case filtered out)
def remaining = (40.0 - doc["start_min"].value)*60.0;
diff_sq > remaining;