This page explains how Andrew Nguyen (USATT# 93182)'s rating went from 1319 to 1308 at the OCTTA BUTTERFLY OPEN SUNDAY JANUARY 21, 2024 held on 21 Jan 2024 - 21 Jan 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.