This page explains how Jason Lacey (USATT# 9257)'s rating went from 1824 to 1777 at the Butterfly S&S January Open held on 26 Jan 2024 - 27 Jan 2024. 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.