This page explains how David K Wong (USATT# 91820)'s rating went from 1271 to 1238 at the California State Open held on 26 Mar 2016 - 27 Mar 2016. 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.