This page explains how Teddy Y. Tong (USATT# 1532)'s rating went from 1584 to 1556 at the Grace Lin TTC Open held on - 28 Oct 2012. 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.