Very nice software. Structured study around mate types for various pieces with theory and practice portions. Very nicely done.
Challenging and smart. Superior app.
Soviet checkmate textbook. Cultured & witty text, superb examples. Extra exercises in this package are not as consistently thematic as the subset that are in in the printed book by Henkin (=Khenkin).
No equivalent on iOS
If you are checking for a good move to end the game, download this..!!
Great tactics puzzles, no bugs, very low battery drain
Very nice !!