This page explains how Kent Yu (USATT# 2141)'s rating went from 1261 to 1491 at the Berkeley Open on the JOOLA NA held on - 6 Sep 2009. 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.