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Codecrackers can be described as the "numeric" crossword. A common codecracker is contained in a 13x13 crossword grid. There is also a alphabet table consisted which contains 26 cells each numbered 1 to 26. In each cell you must fill in a unique letter, which corresponds with the crossword.

Here is an example of how one may look like:

All codecrackers must have a starting point, hence at least one letter must be filled in the alphabet table. The letter or letter(s) which is your starting point must also help the user find a unique word in the crossword and continue filling the letters in the table and carry on completing the crossword.

What consists of a good Codecracker?

1. Should be unique and not contain more than one solution per crossword.
2. Use all the 26 letters in the crossword.
3. Not too use too obscure words. (For example: endocrinology!)
4. Not a good idea to use foreign words or words beginning with a capital.
   

Now that you know the rules, you can play the game online right here!