This page explains how Peter Cao (USATT# 219413)'s rating went from 1729 to 1641 at the LATTA Butterfly Thanh Banh Memorial Open held on 22 Jan 2022 - 22 Jan 2022. 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.