This page explains how Alberto Cajigas (USATT# 92128)'s rating went from 977 to 953 at the PTTC Saturday League event from 21 Oct 2017. 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.