This page explains how Joshua Tran (USATT# 71477)'s rating went from 1536 to 1420 at the 2010 Potomac Spring Open held on - 16 May 2010. 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.