This page explains how Laura Zhang (USATT# 1171872)'s rating went from 1215 to 1167 at the ICC - Sunday Beginners League event from 30 Jan 2022. 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.