This page explains how Raymond Chin-Man Yip (USATT# 22026)'s rating went from 1988 to 1986 at the Swan Sunday League event from 6 Jan 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.