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.

			10	8		7	13	16
	13	12 26			7 22
38									10
9			12			9	7
16			13	13 15			12 4
16					6 37
	10	19 32						20	11
17			6				15 6
6			9 4			7 28
	42 6								10
6				8			12
13			3	12 20			3 13
		19 16						23	11
	11 17				15 11
11			5			12	12
12			17	9 16			10 9
	38
	17				16

Free online kakuro puzzles