This page explains how Jason Li (USATT# 94536)'s rating went from 679 to 849 at the Westchester 2015 May Open held on - 31 May 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.