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: Start with clues that only have one valid combination. For example, 3 in 2 must be 1 and 2, and 23 in 3 must be 6, 8, and 9.

	19	30	16		20	7	4	19	27
22				20
13				32 9
15			11 14			20	6
	20						9 19
	13 8				11 38
4			8	9				23	12
17				35 8
	21	18 8				11	9
10			23				15 6
14			19	8 20				34	10
24						21
		11 34				6	5 17
	7 15				18 13
10			25						12
8			4	4 7			14 8
32						11
16						6

Free online kakuro puzzles