This page explains how Paul Villacarlos (USATT# 5399)'s rating went from 1207 to 1231 at the Sacramento Spring Open held on - 19 Apr 1997. 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.