This page explains how Billy Xu Ding (USATT# 71687)'s rating went from 2134 to 2169 at the Spttc Saturday Night League event from 9 Dec 2017. 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.