Good news, everyone!
You can submit some interesting OSR leagues games you would like to be explained by Mateusz by answering this forum thread. We will then choose one game from dan league and one from OSR league randomly.
He also runs a website featuring a go shop and offering online go lessons. The 8th cycle of its online go school will start on the 12th of July and you can register by writing an email to firstname.lastname@example.org.
The OSR team would like to thank Mateusz for helping us improve our go!