This page explains how Jon Hiratsuka (USATT# 49174)'s rating went from 1422 to 1516 at the Club Joola January Open held on - 27 Jan 2008. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.