This page explains how Yubin Liang (USATT# 266540)'s rating went from 1280 to 1279 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 12 Nov 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.