This page explains how Brooks Marquette (USATT# 222126)'s rating went from 1231 to 1221 at the SCTTC Sunday League event from 31 May 2018. 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.