This page explains how Oliver He (USATT# 74963)'s rating went from 1894 to 1864 at the Spttc Saturday Night League event from 19 Aug 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.