Happen, go through the steps I took before to make sure you've done all Something isn't happening that this walkthrough mentions is supposed to Feel free to deviate from this walkthrough, but if Several different orders, although there are a few steps that must comeīefore others. It's not very clear if there is anything truly unique in any particular puzzle that is not repeated millions of times over the entire sextillion Sudoku universe.Is a nonlinear, point-and-click game this means actions can be done in There are lots of variations and number mappings for each puzzle. I've spent a lot of time thinking about Sudoku puzzle uniqueness. Random puzzles with asymmetrical pattern of givens I find to be the most interesting. But generally, I have found hand-craft puzzles with lots of symmetry to be easier to solve. I find all Sudoku puzzles having the same level of fascination regardless of its origin. As far as I can tell, elegant is in the eyes of the beholder. Harder puzzles have more than one solution path. All puzzles have a solution grid and a solution path. "įor me personally, I don't see any difference between hand crafted puzzles and one's created algorithmically. That's way more than the number of stars in the universe. "There are 6,670,903,752,021,072,936,960 possible solvable Sudoku grids that yield a unique result (that's 6 sextillion, 670 quintillion, 903 quadrillion, 752 trillion, 21 billion, 72 million, 936 thousand, 960 in case you were wondering). Or, are you describing a class of 17 puzzles over the entire sextillion number of solvable given constellations in the Sudoku universe?
What do you mean by 17-known Sudoku puzzles? Do you mean puzzles having only 17 initial givens. There is a very small market for very hard sudoku in general, but it's not like the world is waiting for the first person who finally makes an algorithm for creating hard sudokus. Some of them are relatively easy, some are challenging and some are not solvable without very advanced techniques. So doing anything else than choosing an existing base of the targeted difficulty and do some swapping is just a waste of calculation resources.ġ7 givens has nothing to do with "damn-near impossible" difficulty. These are all classified for the needed solving steps, and using an equivalent puzzle doesn't change the logical path. This data is widely regarded as complete or very close to complete, since no new base puzzle has been found for years despite for a lot of effort. It has something around 50000 "base puzzles", where puzzles that can be changed into each other by swapping rows and columns, rotation and reflection or permutation of digits are considered equivalent. Also there is a database of the known 17 puzzles. 20 givens is already a really remarkable feat to do by hand and each digit less gets exponentially harder to set. None of the 17 given classics are handcrafted.
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