This page explains how Bin Hai Chu (USATT# 13020)'s rating went from 2028 to 2020 at the BCC Butterfly March Open held on - 13 Mar 1999. 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.