Kakuro is a kind of logic puzzle that is often referred to as a mathematical transliteration of the crossword. Kakuro puzzles are regular features in most, if not all, math-and-logic puzzle publications in the United States. Dell Magazines came up with the original English name Cross Sums and other names such as Cross Addition have also been used,but the Japanese name Kakuro (abbreviation of Japanese kasan kurosu (加算クロス, addition cross)) seems .....
Kakuro 7x7 Kakuro 8x8
Kakuro 10x8 Kakuro 10x10
Kakuro 12x10 Kakuro 12x12
Daily Sudoku
The puzzle is most frequently a 9×9 grid made up of 3×3 subgrids (called "regions"). Some cells already contain numbers, known as "givens". The goal is to fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1 through 9 exactly once. 
