This page explains how Zihao Fang (USATT# 277539)'s rating went from 1836 to 1812 at the Butterfly S&S December Open held on 16 Dec 2023 - 17 Dec 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.