Go is a wonderful game. My older brother bought a Go set when I was a little kid and we played together. Now, 65 years later I need to give him a 9 stone handicap (I cheated by taking lessons from a South Korean Go Master and studying several books), but thanks to the wonderful handicap system, games can still be fun even when players have very different skill levels.

I randomly tried a few exercises on the linked web site - nicely done!

Off topic, but I wrote a commercial Go playing program in the late 1970s. This was a great hobby.