This page explains how Vladimir Zafrin (USATT# 279587)'s rating went from 536 to 526 at the AZ PTTC Monday event from 23 Oct 2023. 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.