Hi guys! I am a 4,005 Solo MMR player who recently purchased and gifted a Ti7 Battle Pass for my 13 year old little brother who has a Solo MMR of 1,654. I wanted to help him get out of the 1k bracket and play in a much better tier. Being his older brother with triple his MMR score, I decided to use his account during this year's Seasonal Matchmaking and boost him to calibrate on a new tier. I won 7 out of 10 games where I averaged 590 GPM and 600 XPM using cores going mid like Tinker, Invoker, PA. I got insanely high kills as well mostly 15 kills being the minimum to 29 kills being the highest. To my disappointment after the 10 games, his Solo MMR calibrated to 1,945. I do not understand what the fuck just happened. Is there a hidden system behind the calibration?