This page explains how Christopher B. Lehman (USATT# 7680)'s rating went from 1913 to 1899 at the Topspin Advanced League event from 25 Mar 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.