Add Yahoo as a preferred source to see more of our stories on Google. Daily puzzlers would be quick to tell you that sudoku, Wordle’s mathematical cousin, is not as easy as it looks. The small grid, ...

Fancy yourself as a Sudoku whizz? Can you complete the tasks faster than all your friends? Well, now comes the ultimate test - the world's most difficult puzzle. Finnish mathematician Arto Inkala ...

Maths genius Dr Arto Inkala has revealed the world’s hardest sudoku puzzle yet. The Finnish brainbox’s latest version of the number grid puzzle is designed to bamboozle fans. It is even more ...

Some games and puzzles have rules that are quickly learned, but still present a challenge. They become immensely popular. Free Cell, the solitaire game, is an example. Sudoku is another. Never heard ...

A new version of global search engine Google can now solve Sudoku, the popular maths puzzle which took the world by storm with its simple grid of digits and empty boxes -- no matter what the level of ...