This page explains how Ryan Lin (USATT# 220032)'s rating went from 1827 to 1830 at the MDTTC Tuesday/Friday League event from 21 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.