This page explains how Helen Wilson (USATT# 10989)'s rating went from 1376 to 1391 at the Trolley Car TTC Tuesday Night League event from 29 Dec 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.