This page explains how Ryousuke Adachi (USATT# 33546)'s rating went from 1643 to 1642 at the LATTF event from 8 Jun 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.