This page explains how Michael K. Marinas (USATT# 38893)'s rating went from 1310 to 1258 at the 888 League event from 22 Oct 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.