This page explains how Ruikang Wang (USATT# 272056)'s rating went from 811 to 809 at the PTTC Saturday League event from 30 Sep 2023. 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.