This page explains how Bill Robert Sampson (USATT# 74708)'s rating went from 1499 to 1539 at the Spttc Saturday Night League event from 1 Jul 2017. 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.