Expert Sudoku HD

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.