This page explains how Derek Lee (USATT# 75598)'s rating went from 1781 to 1741 at the 2022 Butterfly Teams Tournament held on 13 Aug 2022 - 14 Aug 2022. 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.