The Best iphone, ipad Puzzle Apps and Mechanical Puzzles: World's Hardest 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
I SOLVED THE WORLD'S HARDEST CLASSIC SUDOKU !!! - YouTube
World's hardest sudoku puzzle ever: Can you solve the most baffling brainteaser ever devised? - Mirror Online
Mathematician Arto Inkala creates world's hardest Sudoku, 'Everest' | Metro News
Is suposed to be the hardest sudoku ver, and i have no idea what to do : r/sudoku
Ai Sudoku - 1002 vaikeaa tehtävää - Arto Inkala | Kirjamari Oy | Osta Antikvaarista - Kirjakauppa verkossa
World's Hardest Sudoku Cross Stitch PDF Pattern | The Needle & Floss
The World's Hardest Sudoku - try it now - The TechGears
It took three months to create, so how long will it take to crack ...the world's hardest Sudoku? | Daily Mail Online
Figure 10 from An evolutionary approach to sudoku puzzles with filtered mutations | Semantic Scholar
The World's Hardest Sudoku - try it now - The TechGears
Solución del sudoku más difícil del mundo | El Comercio
Figure 10 from An evolutionary approach to sudoku puzzles with filtered mutations | Semantic Scholar
Testaa taitosi: Suomalaistohtori kehitti maailman vaikeimman sudokun - Kotimaa | HS.fi
Introduction - Sudoku and Solver
