This page explains how Amir Reza Aref Laleh (USATT# 274949)'s rating went from 844 to 855 at the Swan Sunday League event from 29 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.