This page explains how Stephanie Qin (USATT# 275694)'s rating went from 1421 to 1280 at the TTA Adv League - SUNDAY event from 30 Apr 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.