Go is a great strategic game, similar to chess and extremely popular in Korea, China and Japan. It has had two golden eras in the western world: the anime Hikaru no go and more recently the crowning of AlphaZero as the first AI to reach super-human level.
I list below the go resources I enjoy the most.
I use mainly Tsumego Pro, even though the problems are badly ranked. From time to time I also use the collections gathered by tasuki. They contain only problems, not solutions, which makes them both frustrating at times and very rewarding. Last but not least, goproblems.com has a huge database of problems that is collaboratively extended and curated.
Apart from playing mindfully (which is by far the fastest and most efficient way to improve), the ways to learn I enjoyed the most were:
- getting reviews from stronger players both online and in local clubs
- learning from Inseong Hwang at the European Yunguseng Dojo
- reviewing my own games with Leela Zero, using Lizzie as an interface
A friend of mine also started Art du Go, a great website to discover the fundamental concepts of Go if you understand French.