Kakuro

Language:

4x4: easy intermediate hard challenging expert
6x6: easy intermediate hard challenging expert
8x8: easy intermediate hard challenging expert
9x11: easy intermediate hard challenging expert
9x17: easy intermediate hard challenging expert

Kakuro is like a crossword puzzle with numbers. Each "word" must add up to the number provided in the clue above it or to the left. Words can only use the numbers 1 through 9, and a given number can only be used once in a word. Every kakuro puzzle has one and only solution, and can be solved through logic alone.

Kakuro Blog
Kakuro Rules
Kakuro Tutorials: Basic Challenging

Kakuro Hint: Not sure what all of the valid combinations are for a number? Click on the number clue, and a tooltip will show you the possibilities.

			11	16			10	40
	11	10 35				15 8			14
20					19 10
14			22	9 3			10 10
	11					4
	18 24					9 34			9
24					26 16
12				5 20			16 12
15			12 7
		32						37	6
	13	13 35					12
10			10 18				10 19
15						13 14
	14				21 10
	11 4			12 5					4
8			10 12			8	10 13
17					20
	16				7

Free online kakuro puzzles