This page explains how Elvis R Lopez Almonte (USATT# 79339)'s rating went from 1833 to 1820 at the Central Carolinas Super League event from 18 Apr 2013. 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.