Play multiplayer against other humans, or practice against the computer. We built our computer opponent (AI) from the ground up. To our knowledge, our AI at its highest level can beat any other publicly available AI.
Viking Chess is also sometimes called King's Table, Tafl or Tablut. There are different variations. This game is based on the Hnefatafl championship rules from the Fetlar Hnefatafl Comittee.
The source for the game can be found here: https://github.com/apotapov/tafl