This collection of 50 Crypdoku puzzles starting with easy grids will get a bit harder as you go along, but no matter how challenging the puzzle, you're guaranteed to have fun, and you may learn a thing or two about some of the most famous true crimes ever.Each message has 2 different elements that you use against each other to solve the message. In this case, the simple substitute cipher is encoded with numbers, while a 9x9 sudoku grid is filled with letters. Those 9 letters in the grid, will correspond with the numbers in the cipher.
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