Colossal Kakuro
Kakuro puzzles are like a combination of crosswords and sudoku. Each clue in the grid shows the sum of the digits in its answer, and just like sudoku, digits are never repeated.
Union Square & Co.
Kakuro puzzles are like a combination of crosswords and sudoku. Each clue in the grid shows the sum of the digits in its answer, and just like sudoku, digits are never repeated.