The Ṙ algorithm was developed with one thing in mind: to put people in order. It's not perfect, but it has some nice attributes that we like, notably:
- ratings are from 0.0 to 1.0;
- the average rating in a group is 0.5;
- all ratings are updated after every result;
- if you win, your rating goes up; and,
- if you lose, your rating goes down.
elapsed: 0.1171; build_item: 2; find_one: 2; loads: 9.8705291748e-05; sql: 0.000245809555054