This page explains how Jan Gabriel Diemont (USATT# 198498)'s rating went from 579 to 579 at the SVTTC Sunday U2000 event from 17 Apr 2016. 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.