This page explains how Xiaocong(Peter) Guo (USATT# 16855)'s rating went from 2006 to 1964 at the Spttc Saturday Night League event from 22 Jul 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.