This page explains how Simen Potaychuk (USATT# 21163)'s rating went from 1932 to 1913 at the 2015 Valley of the Sun held on 5 Dec 2015 - 6 Dec 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.