This page explains how Peter Valera (USATT# 89299)'s rating went from 1501 to 1489 at the Laguna Hills High School Open held on - 28 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.