Sudoku : Challenge Attractive Layout, Amazing Graphics, Extraordinary Designed Board, Intuitive User Interface, Ease of Use. This is the Sudoku that you should challenge like you never experience before. Unlimited puzzles with varied level of difficulty to fit your choice. You’ll never regret having this Sudoku Challenge, which is just perfectly challenge your mind, your logical thinking skill, your brain cells! Interrupted? Need a Break? Exit Sudoku Challenge and you’ll get to see your incomplete puzzle is saved and awaiting for your return. Stuck? Need some guide? Simply click on hints and you'll get an answer right away! Useful hints as aid, why not! Feature: - Intuitive Number Pad - Smart Notes - Conflict Checking - Auto Save Mode - Levels of Difficulty - Endless, Randomly Generated Puzzles - Game Timer - Pause/Resume Puzzle - Smart Hints - Auto Disable Fully Filled Number Rules - Every cell in each row, column and nonet (3x3 group of cells) must contain a unique digit from 1 to 9 only once.