This page explains how Olivier Charlas (USATT# 230405)'s rating went from 1212 to 1247 at the Richmond TTC Weekly League event from 21 Jul 2021. 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.