This page explains how Ian Seidenfeld (USATT# 80503)'s rating went from 2163 to 2188 at the 888 Silicon Valley Team Championships 2023 held on 27 May 2023 - 29 May 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.