WARNING!! Expert Sudoku HD is for serious Sudoku players only! Our hand-crafted puzzles are solvable with only one solution (but no guessing is required). Show your expertise using advanced solving techniques like: Naked and Hidden Triples, X-Wing, XY-Wing, Swordfish, Forcing Chain, 2-String Kites, Skyscraper, Unique Corner, and more.

FEATURES
* 1,000 unique handcrafted puzzles
* Assortment of puzzles in different styles: standard, symmetrical and patterned
* Four different skill levels
* Multiple color schemes
* Show Incorrect :: Shows incorrect answer in red
* Multiple Notes :: for each answer square
* Smart Buttons :: Disables the number button when that number is completed on the game board
* Smart Notes :: Removes the number from the notes in the box, column, and row that contains that cell with your correct answer
* Best Times, Progress statistics
* Send an email challenge to a friend so they can try to beat your best time on a puzzle
* Pause the game at any time and resume where you left off
* And much more

ALL ASSISTANCE OPTIONS ARE TURNED OFF BY DEFAULT. You can turn them on if you want a little help in solving your puzzle.