This page explains how Minglang Du (USATT# 277219)'s rating went from 17 to n/a at the ICC - Sunday Beginners League event from 21 May 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.