This page explains how Luis Guillermo Leon (USATT# 249935)'s rating went from 1878 to 1877 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 17 Dec 2021. 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.