This page explains how Lindsey Jacks (USATT# 1171571)'s rating went from n/a to 864 at the Westchester May 2021 Little Open held on 29 May 2021 - 30 May 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.