This page explains how Dong Yang (USATT# 69865)'s rating went from 1951 to 1930 at the LYTTC Wellman Wu Memorial - Giant RR held on 14 Aug 2021 - 15 Aug 2021. 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.