This page explains how Callum Brown (USATT# 93533)'s rating went from n/a to 454 at the Westchester 2014 April Open held on - 27 Apr 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.