17 Sudoku - Hard Sudoku Game app for iPhone and iPad

17 Sudoku using hodoku to difficulty score, score in between 306 ～ 8080.Only the hardest over 700 puzzles added to hard mode . I solved a hard mode puzzle takes more than 60 minutes, just 20 minutes easy mode puzzle.Use gestures, swipe right back to the main screen, shake to switch puzzle, pull to view score.

Sudoku is one of the more interesting puzzle game. Classic Sudoku has been proof requires a minimum number of 17 tips, 17Sudoku include nearly 50,000 Classic sudoku , it only 17 tips number.

About difficulty

Tip number at least in theory, the greater the difficulty, but this is not absolute. A random sample of 20 questions, the time between the completion of 8 minutes to 65 minutes, or a little challenging. Problem-solving process requires not only wisdom and observation but also a test of patience!

About Actions

Click on the lower left corner of the pencil notes mode can be switched to good use notes mode will help you solve the problem of uncertainty.
Interface layout specifically for the left to operate independently and optimize the design, especially for the car and take the elevator scene to use.

About Rules

All the puzzle are Classic Sudoku, the beginning only 17 tip,The object is to fill all empty squares so that the numbers 1 to 9 appear exactly once in each row, column and 3x3 box.