Easy interface
Enjoy an intuitive interface using the mouse or keyboard.
Time yourself (or not)
Compete against the clock and track your top times. Pause the game when you're interrupted.
Highlight digits
Selectively highlight all instances of a specific digit to help scan the board for solvable squares.
Rotate board
Get a different perspective when you're stuck by rotating the board left or right.
Keep on track
Optionally mark incorrect answers to avoid going too far down the wrong path.
Custom colors
Personalize the board by choosing your own colors for the numbers and highlighting.
Universal application
Run the program natively on the new Intel Macs and any Mac with OS X 10.4 (Tiger) or later.