This page explains how Jackson Chen (USATT# 215309)'s rating went from 1128 to 1126 at the AYTTO JAN 2020 Championship II @FDR HS held on 18 Jan 2020 - 18 Jan 2020. 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.