This page explains how Hao Ling (USATT# 219506)'s rating went from 1242 to 1213 at the Austin Table Tennis League event from 11 Jul 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.