This page explains how Donald C. Hayden (USATT# 51994)'s rating went from 1400 to 1390 at the 87th Annual Michigan Table Tennis State Closed Championships held on 6 May 2022 - 8 May 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.