Kakuro

Kakuro or Kakkuro is a mathematical crossword puzzle. The puzzle is played on a grid of black and white cells with clues given in triangle shaped cells scattered throughout the grid. The objective of the puzzle is to insert a digit from 1 to 9 into each white cell such that the sum of the numbers in each entry matches the clue associated with it and that no digit is duplicated in any entry.

Sample Puzzle

Solution