This page explains how Phil Mork (USATT# 222873)'s rating went from 1300 to 1299 at the Central Carolinas Super League event from 12 Sep 2019. 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.