This page explains how Harriet R. Brin (USATT# 18066)'s rating went from 850 to 765 at the Sacramento Spring Open held on - 15 May 2010. 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.