Sudoku is addicitve

Sudoku is hot

Ultra Sudoku is one of the hottest Sudoku's around

• Easy playing: type the number, drag the number or right-click the number
• Generate puzzles: 4 x 4 for beginners or children;
  9 x 9 for standard play; 16 x 16 for expert play
• Exciting twist: use letters instead of numbers
• "Hint" solves single cell when you're stuck
• Email your puzzles to friends or relatives
• Setup your own puzzles from newspapers or magazines