This page explains how David Sun (USATT# 86580)'s rating went from 1979 to 2015 at the 50th St. Joseph Valley Open held on - 9 Mar 2014. 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.