This page explains how Songling Ngo (USATT# 219645)'s rating went from 1461 to 1460 at the Spttc Saturday Night League event from 19 Oct 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.