• An unlimited supply of puzzles.
• Nine different grid sizes from 4x4 to 16x16.
• Play with numbers or letters of the alphabet.
• Seven different background skins, plus change colours to suit your mood.
• Play against the clock and compete to get in the roll of honour.
• Five levels of difficulty.
• Pencil in your working as you go with right mouse button, confirm your choice with the left button.
• Unique coaching modes to help you learn or solve the trickier puzzles.
• Enter the puzzles from the newspaper and play them as a normal game, or have the program solve it for you and show you the answer.
• You can also print out puzzles to play on paper, and save a game to return to later or to mail to a friend.
• Full undo/redo history so you can backtrack through your game.

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