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Sudoku Xtra 22
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All the puzzles from PuzzleMix, plus many more!

# Sudoku puzzles and instructions

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Sudoku puzzles are the surprisingly-popular number-placing puzzles that were introduced to the world at large via the pages of The Times in late 2004, and have since gone on to earn a place in many of the world's newspapers.

How to solve Sudoku puzzles
A Sudoku puzzle consists of a grid, usually 9x9 but sometimes smaller or larger, where you must place 1 to 9, or 1 to whatever the size of the puzzle is, once each into every row, column and bold-lined rectangle. In the 'classic' 9x9 puzzle these bold-lined rectangles are 3x3 in size and there are 9 of them.

When you first open a puzzle some of the squares are already filled-in, and your task is to fill in all of the remaining ones. Since Sudoku is a logic puzzle, the intention is that you do this without guesswork - instead logical deduction is the intended method, and this is where the fun comes in. It's also important to note that despite using digits, there is absolutely no mathematics involved! You could use pictures or letters or any other set of symbols you liked.

Look at the solved puzzle on the left. Notice how each row, column and bold-lined rectangle has one each of 1 to 6 in it. That's because this is a 6x6 puzzle. In a 9x9 puzzle there'd be one each of 1-9 in each of those regions.

Sudoku puzzles on puzzlemix appear at a wide range of sizes and difficulties. Usually they are 6x6, 8x8 or 9x9, in which case you must place 1-6, 1-8 or 1-9 once each into every row, column and bold-lined rectangle. The bold-lined rectangles are 2x3 for 6x6 puzzles, 4x2 for 8x8 puzzles and they are 3x3 for 9x9 puzzles.

Occasionally puzzlemix will feature a larger Sudoku 12x12 or even Sudoku 16x16 puzzle. In these cases you must place 1 to 9 and A to C, or 1 to 9 and A to G respectively, into each row, column and bold-lined box.

Other types of puzzle
It's not just Sudoku you can solve online at puzzlemix. You can also solve logic puzzles that include these:

Keywords
Are you searching for help with Sudoku puzzles? Stuck on solving Number Place? Don't know the instructions for Sudoku? Need Sudoku instructions? Want solving hints and tips for Sudoku? Then puzzlemix is the place for you to play Sudoku puzzles online.