This page explains how Blessing Tung (USATT# 212694)'s rating went from 977 to 917 at the ICC - Sunday Beginners League event from 30 Sep 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.