This page explains how Ricky Guan (USATT# 1177768)'s rating went from 1216 to 1155 at the 2023 HITTA Butterfly Spring Tournament held on 18 Mar 2023 - 19 Mar 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.