This page explains how David K. Chwa (USATT# 19817)'s rating went from 1847 to 1849 at the LATTF event from 19 Oct 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.