This page explains how Ryousuke Adachi (USATT# 33546)'s rating went from 1521 to 1520 at the LATTF event from 12 Mar 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.