Regarding the difficulty of the puzzles to generate, there was already work done on rating the difficulty of each solving technique in numbers. I have slightly changed the names of some of the techniques to names that are more common, since there are a few techniques that have different names and it can get confusing at times. The sudoku techniques I wanted to implement are: Naked Singles, Hidden Singles, Candidate Lines, Multiple Lines, Naked Pairs, Hidden Pairs, Naked Triples, Hidden Triples, X Wing, Y Wing, Forcing Chains, Naked Quads, Hidden Quads, Swordfish. Sudoku Of The Day proved to be an invaluable resource for me to learn about sudoku solving techniques and generating unique sudokus as well. Even though there are many sudoku solving techniques, this site explained the ~14 most used solving techniques by sudoku players. I spent a few hours on trying to find something relevant to what I was looking for, and finally managed to land on a couple of pages that were worth it.
#Sudoku puzzle maker online how to#
Therefore, I took a step back and started researching again and completely changed my approach towards the process of generating sudokus.ĭuring my research on sudokus, I stumbled upon lots of forums and tutorials on how to generate the sudoku puzzles, however, most of them were really simple and disregarded the difficulty options and possible sudoku solving techniques. Based on the immense number of possible puzzles, I concluded that I am trying to find a needle in a hay stack the size of the universe. Protected by Copyscape plagiarism checker. We also supply Sudoku puzzles for newspapers, books, magazines, websites and more.
Moreover, my current findings at the time seemed to have little to no importance at all, because the sample of puzzles I was working with, was really small compared to the actual number of possible unique sudoku puzzles, which is 6.6 sextillion ( 6,670,903,752,021,072,936,960) puzzles, so 9 million makes up 0.00000000000013491425351884718 % of the total number of possible unique sudoku puzzles. Play Sudoku - the number placing game taking the world by storm. So, without wasting any time, I started writing down all the combinations and permutations of the range of numbers from 1 to 9 found a sample of 9 million sudoku puzzles online, for which I had to create a small C# program for splitting this data into smaller chunks and loading it into my Unity project, and started testing out and keeping notes on whatever patterns I could find.ĭuring this phase, I was constantly seeking any advice or insights I could get from my colleagues and professors, online forums and so on, in order to back up my findings.
At first, I was wondering if there are any hidden patterns within the sudoku solutions, patterns that perhaps can be used to generate sudoku puzzles.
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