This page explains how David Maisel (USATT# 76188)'s rating went from 1635 to 1623 at the MATTBC Open held on - 22 Feb 2014. 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.