This page explains how Margaret A Hashimoto (USATT# 22394)'s rating went from 1399 to 1393 at the LATTF event from 13 Nov 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.