This page explains how Marcin Wieczorek (USATT# 275669)'s rating went from 1386 to 1356 at the NYISC May 2024 Open held on 4 May 2024 - 4 May 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.