A Finnish mathematician has concocted what he claims to be the toughest Sudoku the world has ever seen.
Arto Inkala has come up with what he describes as the 'Everest' of numerical games in order to try and test the sharpest minds in the world and, presumably, leave the rest of us scratching our heads.
A mathematician from Finland has created what he claims is the most difficult Sudoku the world has ever seen (Arto Inkala - www.aisudoku.com)Generally, the brain teasers are scored on difficulty with a range from one to five, the former being the easiest and the latter the hardest.
Mr Inkala feels that this particular test would come with an eleven rating.
The point that makes this particular teaser so tricky is the number of deductions needed to fill in a single number on the grid.
Rather than being able to spot where a number goes according to boxes already filled in, the Telegraph reports that most moves will leave you with two or more spaces where a number could conceivably go.
While only one of these is correct, all possible options need to be looked at for the next move and sometimes even the move after that.
'It is difficult to say if any one [puzzle] is the hardest or not, because I believe the hardest one is not yet discovered,' Mr Inkala told the newspaper.
'I am not sure if it is impossible to make, but there are so many possibilities to formulate that [I think] the most difficult one has not yet been found.'
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