Sudoku 999

Sudoku 999 is based on the classic Sudoku game.
Sudoku is a logic-based number placement puzzle.
Starting with a partially completed 9x9 grid, the objective is to fill the grid so that each row, each column, and each of the 3x3 boxes (also called blocks) contains the digits 1 to 9 exactly once.
Sudoku 999 has 999 computer generated game boards divided equally in 3 categories.
Features:
• 3 difficulty levels.
• computer generated boards
• unique solutions for each board
• best completion time for each board.
• keeps game data for each started game even after closing the app