Go is ancient strategy game with simple rules. Hactar go is perfect for learning go, and to study go anywhere you are.
Best way to learn go is thru game of capture-go. Hactar can play capture-go with you.
Once you are skilled at capture-go you can try go against Hactar server. Hactar strength is about 1 dan in 9x9 board and 5 kyu in 19x19 board. If this is not enought, you can subscribe to stronger engine playing at 3 dan level in 19x19 board.
It is possible to search games for position or players. Search covers games from well-known public WEB archives, more that 80000 pro games are available. You can include also your games in the device.