This page explains how Willy Leparulo (USATT# 13012)'s rating went from 2003 to 2025 at the 2015 JOOLA North American Teams Championships held on - 29 Nov 2015. 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.