This page explains how Jack Allen (USATT# 70484)'s rating went from 1899 to 1886 at the 50th St. Joseph Valley Open held on - 9 Mar 2014. 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.