This page explains how Victor Grubsky (USATT# 92875)'s rating went from 1405 to 1391 at the LATTA Butterfly Open March 2023 held on 25 Mar 2023 - 25 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.