Check out my Grandmaster support stream at https://www.twitch.tv/bentbeyondrepair
In this video BenTbeyondrepair, Grandmaster Braum support main goes over a brief summary/tldr of true skill/true skill 1 and true skill 2 and the implications of their implimentation on ranked league of legends
Paper for trueskill https://proceedings.neurips.cc/paper_files/paper/2006/file/f44ee263952e65b3610b8ba51229d1f9-Paper.pdf
Paper for trueskill 2
https://www.microsoft.com/en-us/research/uploads/prod/2018/03/trueskill2.pdf