“Go, Weiqi, or Baduk1 is a strategic, two-player board game originating in ancient China between 2000 BC and 200 BC.”
You can also play vs GNU Go.
Its easy to learn but I’m still struglling to get my first cap.
Reading Sensei’s Library improved the way I play so you may want to check it out. It reminds me of chess how you really have to concentrate and at times think ahead. Register at IGS Pandanet and take me on, my username is Chrismo.