This page explains how Jason K Lai (USATT# 91444)'s rating went from 1870 to 1790 at the Sky High Winter Open held on - 8 Feb 2015. 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.