This page explains how Ryan Dabbs (USATT# 89506)'s rating went from 1968 to 1969 at the MDTTC Saturday League event from 25 Jan 2015. 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.