Arto Inkala
It took three months to create, so how long will it take to crack ...the world's hardest Sudoku? | Daily Mail Online
The World's Hardest Sudoku - try it now - The TechGears
Can You Solve the Hardest-Ever Sudoku? - ABC News
World's hardest sudoku: Can you solve Dr Arto Inkala's puzzle? - Mirror Online
In 2012, Finnish mathematician Arto Inkala claimed to have created the "World's Hardest Sudoku". - )
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AI Escargot - The Most Difficult Sudoku Puzzle by Arto Inkala
World's Hardest SUDOKU 2010 ; part 7 of 7 / final - YouTube
Is sudoku more than just a puzzle? asks Marcus Du Sautoy | Daily Mail Online
The world's hardest sudoku - solved | Newspapers | The Guardian
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Mathematician Arto Inkala creates world's hardest Sudoku, 'Everest' | Metro News
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
Sudoku Snake - AI Etana
World's hardest sudoku: Can you solve Dr Arto Inkala's puzzle? - Mirror Online
World's Hardest Sudoku Puzzle Cross Stitch Modern Pattern | Etsy Sweden
AI Escargot - The Most Difficult Sudoku Puzzle by Arto Inkala
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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
Can you solve the world's hardest Sudoku?
