This page explains how Yun Peng (USATT# 76263)'s rating went from 1947 to 1928 at the Swan Sunday League event from 29 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.