This page explains how Qing Chai (USATT# 196751)'s rating went from 1069 to 1091 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 14 Feb 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.