This page explains how Raymon Zhang (USATT# 220907)'s rating went from 803 to 909 at the Spttc Saturday Night League event from 15 Jun 2019. 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.