Wilhelm Steinitz - la Leyenda

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* Chess King app released! Now you can study all courses within one app! The app provides subscriptions to all courses.
* Added night mode
* Added option to disable popup ads for 1 hour
* Added "Make current move" button in engine analysis mode
* Added "Сlear statistics" option
* Theory exercises are now marked as read after 3 seconds
* Fixed display issue on Android 8 in landscape mode
* Improved engine mode
* Various fixes and improvements