This page explains how David K. Chwa (USATT# 19817)'s rating went from 1859 to 1862 at the LATTF event from 7 Dec 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.