This page explains how Shuqin Zhang (USATT# 216755)'s rating went from 1309 to 1288 at the Swan Sunday League event from 19 Aug 2018. 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.