This page explains how Guilherme Yanaga (USATT# 221801)'s rating went from 1207 to 1549 at the 2023 Butterfly December Tournament held on 10 Dec 2023 - 10 Dec 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.