This page explains how Derrick Phan (USATT# 91909)'s rating went from 1983 to 2028 at the Swan Sunday League event from 17 Mar 2019. 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.