Kakuro (Cross sum)

Kakuro (Cross sum) puzzle is an interesting variation of crosswords. Anyone who can add two numbers can solve cross-sum puzzles.

Kakuro is a puzzle invented in US (and used in the name cross sums) and got its popularity in Japan. Now, kakuro puzzles made by Yoogi Games is published in several newspapers, magazines and websites around the world.

Rules:

• The clues for ACROSS and DOWN numbers is the sum of digits in that number.
• Only the digits 1-9 can be used.
• You cannot use a digit twice in the same number.
  

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