This page explains how Ryousuke Adachi (USATT# 33546)'s rating went from 1621 to 1601 at the LATTF event from 19 Oct 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.