A free app for Android, by Chess King.

This application is designed to help you learn the 7-piece chess endgame, as well as to play chess with up to 7 pieces on the board (including the kings).

This app allows you to train and test yourself with different positions and make your way through the levels. The app includes:

• A lot of chess knowledge tests in the form of puzzles
• Different levels and different training modes
• A game server to calculate the best moves
• A lot of user interface elements to help you perform moves and analyze positions
• The ability to import and export positions
• A board, notation, and tree view to help you analyze positions
• Two buttons to switch from the current screen to the other screens

As you pass each level, the app will display the best line for the position and will also show you the number of moves you need to mate.

The app has two modes:

Train mode: You can train with different positions and get through the levels. The app will display the best line for the position, as well as the number of moves.

Play mode: You can play with the computer and get through the levels.