This page explains how Rezaur Rahman (USATT# 15426)'s rating went from 1580 to 1576 at the 2015 Rose City Open held on - 6 Jun 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.