This page explains how Chip Rutan (USATT# 51327)'s rating went from 1828 to 1812 at the 2023 BUTTERFLY TEAMS ROUND ROBIN TOURNAMENT held on 28 Jan 2023 - 29 Jan 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.