The hardest Sudoku puzzle: Escargot by Arto Inkala - 9GAG
Global Solution for Sudoku / Ma, Zhong-Qi - 紀伊國屋書店ウェブストア｜オンライン書店｜本、雑誌の通販、電子書籍ストア
KluangMan on Twitter: "In 2012, Finnish mathematician Arto Inkala claimed to have creates the "World's Hardest Sudoku" 😏 lets do this! https://t.co/dqswlge2sU" / Twitter
World's toughest sudoku is here... can you crack it?
Can You Solve the Hardest-Ever Sudoku? - ABC News
The Worlds Hardest Sudoku Puzzle
Arto Inkala氏の「世界一難しい数独」より難しい数独問題を無制限につくる，「世界一難しい数独」を秒殺で解くPeter Norvig氏のPythonプログラムで問題作成，難易度別に1000問提供。問題と解答と候補の絞り込み結果と難易度を表示します
The hardest Sudoku in the world" that a mathematical expert created over three months - GIGAZINE
Can you solve the world's hardest Sudoku?
World's hardest sudoku puzzle ever: Can you solve the most baffling brainteaser ever devised? - Mirror Online
The World's Hardest Sudoku - try it now - The TechGears
Amazon | Ai Escargot: The Most Difficult Sudoku Puzzle | Inkala, Arto | Sudoku
In 2012, Finnish mathematician Arto Inkala claimed to have created the "World's Hardest Sudoku". - 9GAG
Figure 10 from An evolutionary approach to sudoku puzzles with filtered mutations | Semantic Scholar
The 10 Hardest Logic/Number Puzzles
Solving Sudoku puzzles with the deterministic continuous-time solver... | Download Scientific Diagram
Arto Inkala氏の「世界一難しい数独」より難しい数独問題を無制限につくる，「世界一難しい数独」を秒殺で解くPeter Norvig氏のPythonプログラムで問題作成，難易度別に1000問提供。問題と解答と候補の絞り込み結果と難易度を表示します
The hardest Sudoku in the world" that a mathematical expert created over three months - GIGAZINE
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
Das ist das schwierigste Sudoku der Welt
The world's hardest sudoku - solved | Newspapers | The Guardian
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
It took three months to create, so how long will it take to crack ...the world's hardest Sudoku? | Daily Mail Online
Sudoku Solution - May 2014 - What Moves You? Newsletter | Sudoku, Sudoku puzzles, Answers
Can You Crack the World's Toughest Sudoku? | Fox News
