• Puzzle generator for unlimited play
 • Eight difficulty levels: beginner to diabolical
 • Tutorial teaches you new techniques
 • Large, high contrast digits are easier to read
 • Enter games from the newspaper
 • Solver helps with games from the newspaper
 • Advanced techniques like coloring and sashimi
 • User interface optimized for fewer touches
 • Choice of five color schemes
 • Never covers up the board while you are playing
 • Infinite undo/redo