This page explains how Kevin Li Zhang (USATT# 97783)'s rating went from 1990 to 1967 at the LATTA Butterfly February Open held on 24 Feb 2024 - 24 Feb 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.