This page explains how Peter Gaidarev (USATT# 92458)'s rating went from 1956 to 1950 at the Boston TTC event from 2 Oct 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.