This page explains how Teddy Y. Tong (USATT# 1532)'s rating went from 1560 to 1555 at the LATTF event from 6 May 2011. 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.