This page explains how Danny Wan (USATT# 219179)'s rating went from 1958 to 1941 at the LYTTC Friday Pro League event from 31 May 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.