This page explains how Alfred Graham (USATT# 1167109)'s rating went from 1213 to 1223 at the OCTTA JUNE 2021 OPEN held on 19 Jun 2021 - 19 Jun 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.