This page explains how Darren So (USATT# 1173251)'s rating went from 215 to 196 at the Tri-Valley Branch-Fremont TTA League event from 10 Feb 2024. 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.