Tsumego is an Android application that allows Go players to improve their game by solving problems presented in sgf files. This app is developed by zhengping and is available for free in the Lifestyle category of the Google Play Store.

With Tsumego, you can easily parse sgf files and solve Go problems on your smartphone. The app provides an automatic answer feature, which allows you to check if your moves are correct. Whether you are a beginner or an experienced player, Tsumego is a valuable tool for improving your Go skills.

Overall, Tsumego is a highly recommended app for any Go player who wants to enhance their game and tackle challenging problems on the go. It is easy to use, has a user-friendly interface, and offers a great way to practice and improve your Go skills.