This page explains how Nathan To (USATT# 221939)'s rating went from 1920 to 1870 at the 2023 Experior Spring Open held on 29 Apr 2023 - 30 Apr 2023. 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.