Bug in the matrix

Uploaded 14 Jul 2008 by six volts.

Map details

Track id
247017
Type
Race
Difficulty
Advanced
Author time
0:42.740
Awards
0
Author time beatable
Yes
Tags
Race

Freed by

First replay on the map
Stood unbeaten
5,871 days (16.1 years)
Recorded by
backfill scan
Age of the record
2 y ago

Score breakdown

base 10 points
13ELO for freeing this map
Factor×How it was derived
Style1.00Race 1.00
Difficulty1.30Advanced
Length0.97sqrt(0:42.740 / 45s)
Bonus1.00No bonus applies

10 × 1.00 × 1.30 × 0.97 × 1.00 = 12.67, rounded to 13. Why these factors.