This page explains how Daniel Gastel (USATT# 91810)'s rating went from 1276 to 1269 at the Westchester 2015 April Open held on - 26 Apr 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.