Hardest Sudoku Puzzle Ever

A killer sudoku is very similar to a sudoku except that the clues are given as groups of cells the sum of the numbers in those cells. Boolos called it the hardest logic puzzle ever. The puzzle is called the miracle sudoku and it s made by fellow puzzle legend mitchell lee.

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On the difficulty scale by which most sudoku grids are graded with one star signifying the simplist and five stars the hardest this puzzle would score an eleven he explained.

Hardest sudoku puzzle ever. 73 of african americans said they did not have. The worlds hardest sudoku puzzle for those of us that never tire of a well made sudoku challenge finnish mathematician arto inkala has made what he claims is the hardest sudoku puzzle ever. Identified in the same way as the killer sudoku presented in this article the hardest calcudoku was a 9 9 puzzle published on april 2 2013 which only 9 6 of the regular puzzlers at calcudoku. Try to solve it yourself then watch the absolutely thrilling way to crack the code.

Could this be the toughest sudoku puzzle ever devised. We are building a website which will allow you to enter your own sudoku puzzles into the software and this is coming soon. Number cruncher dr arto inkala has created this new challenge to rival the ai escargot grid he drew up in 2006 widely regarded as the. The original article can be downloaded here.

Any two cells separated by a knight s move or a king s move in chess cannot contain the same digit. The miracle sudoku may be the hardest puzzle ever. According to finnish mathematician arto inkala the following puzzle of his own invention is the hardest sudoku puzzle created so far. The miracle sudoku may be the hardest puzzle ever.

And here are the special rules. According to the finnish puzzle maker i called the puzzle ai escargot because it looks like a snail. The world s hardest killer sudoku. The puzzles printed in newspapers can all be solved using simple deduction rules with no guesswork.

The hardest sudoku variant we ve ever seen duration. You can read about making this puzzle even harder on the physics arxiv blog.