AndrSudo

This app generates puzzles with difficulty level between 0 and 20.The probability of generating sudokus with level greater than 0 is about 5%You can save/open your sudoku.Rules applied by generator:1. Singles2. Hidden singles3. Intersection4. Pairs5. Triples6. Remote pair7. Rectangles8. x-wing9. Hidden pairs10. Forcing chains11. xy-wing12. Nishio