This page explains how Rabah Shihab (USATT# 216529)'s rating went from 1177 to 1160 at the Swan Sunday League event from 9 Jul 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.