This page explains how Jerome Vallar (USATT# 212066)'s rating went from 1908 to 1912 at the Golden Western Open held on 2 Mar 2019 - 3 Mar 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.