This page explains how Ihyun Jeon (USATT# 268649)'s rating went from 1430 to 1420 at the ICC - Advanced League event from 8 Apr 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.