This page explains how Weisung Tsao (USATT# 28857)'s rating went from 1911 to 1887 at the TTA Adv League - SUNDAY event from 15 Jan 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.