This page explains how Sofia Xerri (USATT# 222614)'s rating went from 1149 to 1145 at the BTTC League event from 5 Dec 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.