This page explains how Liam Draper (USATT# 1170916)'s rating went from 253 to 266 at the MDTTC Tuesday/Friday League event from 17 Jan 2020. 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.