This page explains how Blandon Chen (USATT# 280553)'s rating went from 49 to 30 at the ICC - Sunday Beginners League event from 4 Feb 2024. 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.