Kansuko, the latest twist on the popular Sudoku number game, combines logic and reasoning with simple addition to create an all-new and exciting type of puzzle that challenges and stimulates your mind. Using just the numbers 1 through 9, fill in the empty squares in the three 3 x 3 grids and the sum column to complete the puzzle. The singles digit from the sum of the numbers in each row is placed in the sum column, which also must have the numbers 1 through 9. Featuring more than 100 puzzles and three levels of difficulty, including Beginner, Intermediate, and Expert, this edition also introduces four brand new variations designed to further test your mind and patience.