This page explains how Tiffany Ke (USATT# 89217)'s rating went from 1855 to 1890 at the MDTTC Saturday League event from 7 Dec 2014. 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.