This page explains how Khoi Nguyen (USATT# 76535)'s rating went from 1966 to 1965 at the ICC California State Open held on - 27 May 2012. 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.