This page explains how Constantin Okrainets (USATT# 17885)'s rating went from 1890 to 1881 at the NJTTC Thursday Adv League event from 27 Dec 2018. 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.