This page explains how Daniel E. Wang (USATT# 54488)'s rating went from 1900 to 1866 at the Westchester 2013 April Open held on - 28 Apr 2013. 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.