Crossoku is a Sudoku with crossword clues. After converting the clue answers to their numeric value you place the answer in the Sudoku just as you would a single number – obeying the Sudoku logic. Answers range from 3 to 9 characters. There are 9 crossword clues with each Crossoku. With each Crossoku you are given 9 key letters to form the answers from and there is always at least one of the numbers on the starting grid to link the answer to. Answers are always placed vertically or horizontally. After placing all the answers in the Sudoku you will be left with a simple Sudoku to solve in the traditional manner.