This page explains how Sanjay Prasanna (USATT# 271207)'s rating went from 631 to 612 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 23 Oct 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.