This page explains how Kei Wakabayashi (USATT# 75909)'s rating went from 1831 to 1825 at the Spttc Wednesday night league event from 26 Feb 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.