The application compatible with offline mode (does not require access to the internet after downloading databases) Advantages and Main features: 1. High quality and corrected puzzles; 2. Does not required a lot of space; 3. Winner gets points for solved puzzles; 4. For errors in the decision points are taken away; 5. You can open cards for points; 6. Hints analyze multiple way to solve puzzle. The databases of chess problems for pumping tactical skill: ■ Mate in 1 move (1-3 stars) - 410+ problems; ■ Forced Mate in 2 moves (1-5 stars) - 170+ problems; ■ Double attack (1-19 stars) - 220+ problems; ■ Mate in 3 moves (5-18 stars) - 730+ problems;