This page explains how Nelson Yamada (USATT# 269784)'s rating went from 1210 to 1192 at the AZ PTTC Monday event from 28 Jun 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.