This page explains how Danny Wan (USATT# 219179)'s rating went from 1809 to 1717 at the LYTTC Friday Pro League event from 5 Apr 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.