This page explains how Marvin Karno (USATT# 22332)'s rating went from 1284 to 1249 at the LATTA Open held on - 28 Sep 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.