This page explains how Tuan A Nguyen (USATT# 279840)'s rating went from 1516 to 1506 at the ICC - Advanced League event from 30 Sep 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.