Sudoku

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Print this sudoku puzzle, and give it a try! Or, click your broswer's refresh button to get a new sudoku. Puzzle difficulty will vary each time. These are offered free for personal enjoyment. Please do not use for commercial purposes. If you like these puzzles, remember to add us to your online bookmarks, mention us on Facebook, or give us a Tweet by clicking one of the buttons to the left.

6		14	10
5	12		16
9	15	7
	2	3	4

		4
6
		13
9	15

15	7	11
2		4	1
6			10
	12		16

12		16	5
	7	11
	3
		14

	6	8	14
	5	12	13
11		15	7
	1	2	3

	2		4
			14
16	5	12	13
	9

9	15	7
	2	3	4
10	6	8	14
16	5	12

5	12	13	16
9
1
	6	8

		6
			12
	11	9
3	4	1

	1		3
14	10	6	8
13	16	5
		9	15

11	9	15	7
	1	2	3
14	10

	5
11	9
4		2
		6

		10
12	13	16	5
15	7	11	9
2	3	4

3		1
8	14
12		16
		11	9

7	11		15
3	4	1	2
		10
12	13

	16	5	12
7			15
3		1
8	14	10	6

Our Japanese friends tell us "sudoku" means something like "single number" referring to the solitary position of each number in the puzzle grid. Although the sound �doku� may also mean, �poison� which would be interesting; �poison number�. Maybe it seems that way when a wrong number is selected. As in most languages, one sound can be associated with several meanings. And when translating into English, it has also been spelled either �soduko�, or �sudoko�. Anyway, although sudoku puzzles were popularized in Japan, they�re actually of European origin being similar to a mathematic concept called �Latin Squares�. Each square is a table or grid in which a number or symbol appears only once in each row and column. In 1979, a puzzle maker (Howard Garnes) expanded the Latin Squares concept to create what was then called �Number Place�. Then, Maki Kaji, President of a Japanese puzzle company, began publishing Number Place puzzles there but called them "Suji wa dokushin ni kagiru� which translates roughly as �the numbers must be single�. Later he limited the number of clues, imposed rules about the symmetry of their appearance, and shortened the puzzle�s name to just sudoku. Since these changes, soduko puzzles became increasingly popular in Japan. Later, with the help of Wayne Gould, sudoku�s spread back to America and now globally. So, although the puzzles have European and American roots, many regard Maki Kaji as the Father of Sudoku.