This page explains how John Salas (USATT# 43722)'s rating went from 1847 to 1843 at the 2010 Spintech Spinathon held on - 30 May 2010. 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.