This page explains how Kevin Zywicki (USATT# 90515)'s rating went from 1631 to 1644 at the Boston TTC Div.B event from 24 Jul 2017. 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.