This page explains how Sophia Zong (USATT# 280254)'s rating went from 17 to 21 at the PTTC Saturday League event from 28 Oct 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.