This page explains how Gun Naung Sumlut (USATT# 89835)'s rating went from 1080 to 1051 at the ICC - Sunday Beginners League event from 26 May 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.