Hello,
I am trying to use glicko 2 rating system in my game. I have implemented it using the formulas described in the document. However I am not sure I understand correctly how the rating deviation ? of a player is increased after periods of inactivity. The document mentions that when a player does not compete during a "rating period" the deviation ? is updated using this formula:
? = sqrt(?^2 + ?^2) (could not embed the formula, it seems that image extensions has been disabled)
where ? is rating volatility.
But using that formula it seems that ? is increased in a very slow rate. For example if a "rating period" is one month and a player has ? = 50 and ? = 0.06(the recommended value for volatility), after 10 years(120 "rating periods") of inactivity ?' = 50.004189. Is that the expected behavior or I am missing something? Is there any way to adjust how "quickly" ? is increased during player inactivity?
Let's hope that there is someone that has used this algorithm in the forums.
Thanks in advance!