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 a number is yet? Fill in its remaining possible values -- the cell will automatically resize to accommodate.

	4	13	6	24			13	37
21						12 12			27
13					13 29
	9	27 26					16
7			8			15	13 32
17			12	35 7
	42 11								7
15					6	10 3
3			18	27 6
	14	24 43						26	10
15						3	15 16
13				6	16 28
	36 12								4
16						26	10
13				16 8			6 11
6			29 10					13	10
13					26
	14				10

Free online kakuro puzzles