14 Dec 2019 - 14 Dec 2019
This page explains how Ryan Chan (USATT# 93477)'s rating went from 2038 to 1967 at the SPTTC December Giant Double Round Robin held on 14 Dec 2019 - 14 Dec 2019. The links below take you to pages that describe various aspects of the ratings processor.
The ratings 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.