![In 2012, Finnish mathematician Arto Inkala claimed to have created the "World's Hardest Sudoku". - 9GAG In 2012, Finnish mathematician Arto Inkala claimed to have created the "World's Hardest Sudoku". - 9GAG](https://img-9gag-fun.9cache.com/photo/a5rPpey_460s_v3.jpg)
In 2012, Finnish mathematician Arto Inkala claimed to have created the "World's Hardest Sudoku". - 9GAG
![CW Accountants on Twitter: "It is National Sudoku day today. Have a look at the world's hardest grid, created by Arto Inkala. Can you complete it? #ChallengeYourself https://t.co/KDAr4PeJUk" / Twitter CW Accountants on Twitter: "It is National Sudoku day today. Have a look at the world's hardest grid, created by Arto Inkala. Can you complete it? #ChallengeYourself https://t.co/KDAr4PeJUk" / Twitter](https://pbs.twimg.com/media/Dmon0LiX4AATGgS.jpg)
CW Accountants on Twitter: "It is National Sudoku day today. Have a look at the world's hardest grid, created by Arto Inkala. Can you complete it? #ChallengeYourself https://t.co/KDAr4PeJUk" / Twitter
![Problem solved... sort of: Mathematicians come up with formula to complete every Sudoku (but trying to understand it could take even longer than doing the puzzle) | Daily Mail Online Problem solved... sort of: Mathematicians come up with formula to complete every Sudoku (but trying to understand it could take even longer than doing the puzzle) | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2012/10/12/article-0-0AD5B9CE000005DC-190_306x309.jpg)
Problem solved... sort of: Mathematicians come up with formula to complete every Sudoku (but trying to understand it could take even longer than doing the puzzle) | Daily Mail Online
Auspac Media - Fancy yourself as a Sudoku genius? Finnish mathematician Arto Inkala spent 3 months designing a Sudoku grid with only one solution. Inkala has warned any potential challengers only the
![Trying out an “expert” puzzle for the first time and I didn't get very far. The hint was to assume R6C2 to be 5 and then the next hint was to assume R7C8 to be 1. Does anybody know the logic in arriving at these hints? Thank you very much : r/sudoku Trying out an “expert” puzzle for the first time and I didn't get very far. The hint was to assume R6C2 to be 5 and then the next hint was to assume R7C8 to be 1. Does anybody know the logic in arriving at these hints? Thank you very much : r/sudoku](https://preview.redd.it/a5hss6im3yw61.jpg?auto=webp&s=284d563be71083a2cd0ebdf5c8b17312840e72f7)
Trying out an “expert” puzzle for the first time and I didn't get very far. The hint was to assume R6C2 to be 5 and then the next hint was to assume R7C8 to be 1. Does anybody know the logic in arriving at these hints? Thank you very much : r/sudoku
![It took three months to create, so how long will it take to crack ...the world's hardest Sudoku? | Daily Mail Online It took three months to create, so how long will it take to crack ...the world's hardest Sudoku? | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2010/08/18/article-0-0AD569E0000005DC-359_233x372.jpg)