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 pro 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 90000 pro games are available. You can include also your games in the device.