This page explains how Yiming Luo (USATT# 927355)'s rating went from 817 to 785 at the ICC - Sunday Beginners League event from 14 May 2017. 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.