This page explains how Jianfeng Song (USATT# 194869)'s rating went from 1887 to 1909 at the Princeton Pong Open League event from 25 Nov 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.