Sudoku Help - Generate a new puzzle
If you want a brand new puzzle to solve you can just generate a new one simply and easily. Alternatively you can download a new puzzle from our web site or start off with a completely blank grid. The program generates a new 'random' puzzle and as there are billions to choose from, you are not going to get the same one next time.
We support a large range of grid sizes, by far the most often used is the standard 9 x 9 grid. Smaller grids (4; 6; 8) are however useful for learning the basics of Sudoku. Larger grid sizes are available too, the 16 x 16 and 20 x 20 are super-sized ones that we offer as a challenge for a dedicated puzzle solver.
Choosing the level of difficulty is more tricky as the art and science of Sudoku puzzle solving is a very personal thing. A puzzle that one person finds easy someone else may find daunting. We have used a special algorithm to carefully check whether a new puzzle is hard or easy to solve but the intervening 'moderate' levels of difficulty may not generate the level of challenge you expect. It is worth experimenting with the different levels of difficulty until you find one that meets your requirements but the random nature of the generation will ensure that no two Sudoku puzzles are ever quite the same.
There are many different forms of Sudoku around these days. We support the more interesting versions. For more information please visit our Sudoku puzzle types page.
You can choose to display the symbols in the standard Sudoku grid with the numbers 1' through '9'. If you choose the 16 grid size the program will use the 'hexadecimal numbers' '0' to '9' and 'A' to 'F'. You can also choose to use letters rather than numbers for the grid. This uses 'A' to 'I' for the 9x9 grid and 'A' through 'P' for the 16x16 grid.
It is normal for Sudoku puzzles to have a symmetric pattern of squares initially revealed. Sudoku solvers take different views on this. The symmetry may be rotational (180 degree or 90 degree) or it may be mirror symmetry (vertical or horizontal). The symmetry is chosen at random. Choosing a 'random' pattern can make a puzzle more challenging to solve but it may be less aesthetically pleasing to look at.
To create the new puzzle press Generate, to create a new blank one with no squares filled in press Blank.
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