This page explains how Ruslan Mahas (USATT# 230232)'s rating went from 1155 to 1148 at the PTTC Saturday League event from 21 Dec 2019. 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.