This page explains how Daniel Rosenfeld (USATT# 89181)'s rating went from 1623 to 1603 at the LYTTC January Open held on - 3 Jan 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.