This page explains how Surasak Uthaithan (USATT# 91710)'s rating went from 1622 to 1563 at the LYTTC Friday Pro League event from 20 May 2015. 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.