This page explains how Chen Cheng (USATT# 279115)'s rating went from 1319 to 1257 at the Spttc Saturday Night League event from 19 Aug 2023. 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.