This page explains how Ryousuke Adachi (USATT# 33546)'s rating went from 1657 to 1641 at the LATTF event from 20 May 2012. 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.