Therefore any other 1, 3, 7 or 9 elsewhere in the block can be removed. To save paper, print 6 free Sudoku puzzles per page, in PDF or HTML and according to 5 difficulty levels : easy, medium, difficult, expert and evil. See this example:īy the same principal as Naked Triplets and Pairs, the blue cells' only four candidates are 1, 3, 7 & 9. Naked Quads are even more rare, but they do occur on occasion, so they are at least worth mentioning. The rule still applies - and you can safely remove 5, 6, & 8 from the other cells. These cells must end up being the 5, 6, & 8, because together they share only those three candidates. Believe it or not, they make up a Naked Triplet. They are the middle cell and the two cells on each end.
Can you find them? Hard to see, aren't they? Here, we still have three cells in the same house that can only be one of three candidates. Therefore, we can remove those pencil marks from the other cells:īe careful, though - these guys don't always have all three candidates in all three cells. Which means none of the other cells in the house could possibly be 1, 5, or 9. It only matters that we know for sure that 1, 5, & 9 go into them somehow. Then you can print off the generated PDF containing the puzzles and solutions Sometimes you want to take Sudoku with you on the go. It is possible to add a QR code on any 9×9 sudoku for example, to make it distinctive. For solving these free and printable 9×9 Sudoku puzzles you need to fill each box with numbers from 1 to 9 so that the same number doesn’t appear twice in any particular row or column. One great way is to personalize them using QR codes. See the Naked Triplet? It's the three cells with only 1, 5 & 9 as candidates.īecause all three cells are in the same house, and because their only candidates are 1, 5, or 9 the actual values of these three cells must be 1, 5 & 9.įor the moment, it does not matter which cell is the 1, which is the 5, or which is the 9. Now you can Choose the difficulty (easy, medium, hard), the number of puzzles per page (1 per page, 2 per page, 4 per page, or 6 per page), and the page size (US Letter or A4). Free Printable Triple Sudoku Puzzles With Answers Many Many More There are many number of ways that you can make use of Printable Sudoku Puzzles. Though not as easy to spot, and also not quite as common, these situations do occur. Working on the same principle as Naked Pairs, Naked Triplets and Naked Quads can also help us remove candidates (pencil marks) from other cells.