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.

	21	37		9	22		36	17
3			17			10			16
7			8 12			22 34
19				34
16				10	17			23
	22 11				23 18				27
17			33 16
11				15 3			9 16
	12	7 16				6 9
15					13 12
6				19 35				42	9
3			16 30			21 8
21							6 24
	8				23				21
	4	15 11			10	23
27						18 12
20				11			10
	3			4			5

Free online kakuro puzzles