Do all my matches count towards my rating equally?
All matches a player had played in the last 45 months against rated opponents are taken into account. However, matches completed recently are more heavily weighted than those farther in the past.
Weights for matches in the last 15 months follow a square root curve starting at 1 and ending at 0.1. Matches in months 15-45 fall off linearly as a function of time starting at 0.1 (for 15 month old matches) and ending at 0 (for 45 month old matches). Put simply, a player’s recent results are most impactful to their rating, resulting in the algorithm being more responsive to a player’s current level of performance.