Alpha Tsumego will help you to improve your undestanding of Go.
This tsumego collection contains problems for beginners and for master players.

Features
* 6500 Go problems from 30 kyu to 6 dan
* Alpha Tsumego offers you daily problems from different sets
* Built-in rating system determines your level

Game aspects:
* Life and Death
* Tesuji
* Semeai
* Attack and Defense

Solve Go problems for at least 10 minutes every day and finally you will play Go stronger than legendary program AlphaGo.