This page explains how Lucia Sun (USATT# 230237)'s rating went from 1889 to 1877 at the Silicon Valley Championships held on 18 Feb 2023 - 20 Feb 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.