This page explains how Xinbo He (USATT# 274910)'s rating went from 61 to 44 at the ICC - Sunday Beginners League event from 16 Jul 2023. 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.