This page explains how Sean Koster (USATT# 212045)'s rating went from 1634 to 1612 at the 2018 TT&M March Madness held on 24 Mar 2018 - 25 Mar 2018. 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.