This page explains how Frank Yueneng Yueneng Wang (USATT# 222180)'s rating went from 1821 to 1789 at the LATTA Butterfly January Open 2023 held on 28 Jan 2023 - 28 Jan 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.