This page explains how Nelson Yamada (USATT# 269784)'s rating went from 1559 to 1556 at the AZ PTTC Monday event from 29 Aug 2022. The links below take you to pages that describe various aspects of the ratings processor.

The ratings 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.