This page explains how Allison Yiqiong Zhang (USATT# 279820)'s rating went from 1717 to 1681 at the San Antonio Butterfly New Year's Open held on 6 Jan 2024 - 6 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.