国际象棋：简单防御

2018年04月06日

* Chess King app released! Now you can study all courses within one app! Download new Chess King app from Google Play! All statistics and purchases can be transfered to the new app using Chess King account linking.
* Showing hint arrows when trying to make impossible move (useful in case of checkmate)
* Showing pieces balance panel in practice (scroll navigation panel with arrows to view)
* Various fixes and improvements