This page explains how Stephen I Dreyfus (USATT# 5463)'s rating went from 1822 to 1825 at the 2015 Butterfly Atlanta May Open held on - 9 May 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.