This page explains how Mossa Barandao (USATT# 84060)'s rating went from 1857 to 1850 at the Potomac 2015 Spring Open held on - 17 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.