This page explains how Dayson Dereta (USATT# 216075)'s rating went from 1441 to 1421 at the Essential Table Tennis OKC event from 29 Apr 2021. 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.