This page explains how Zhigao Si (USATT# 231275)'s rating went from 2489 to 2454 at the TTA Adv League - SUNDAY event from 8 Aug 2021. 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.