This page explains how Songling Ngo (USATT# 219645)'s rating went from 1088 to 1077 at the Spttc Saturday Night League event from 26 May 2018. 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.