This page explains how Jack Dong (USATT# 271142)'s rating went from 490 to 487 at the TTA Beg/Inter League - SATURDAY event from 10 Apr 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.