This page explains how Lilas Samirad (USATT# 90355)'s rating went from 1100 to 1087 at the AZ PTTC Monday event from 18 Feb 2015. 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.