There is a one-page article on Arta Inkala's 'Toughest Sudoku' in today's Mumbai Mirror. I had given it a shot last night and was able to solve it in 21 minutes using guesswork. His challenge to everyone is to find a logical path of solving it, which he says can take weeks! I had given my views and feedback.
Well, this puzzle was claimed to be "the toughest" several years ago ; things have changed now and there are lots of harder puzzles available. Anyway, finding a logical way to solve this one is a real challenge. Using guesswork, french player Yannick Meyapin solved it in 15/20 minutes during a competition.
Here is a puzzle which is theoretically even more challenging, with or without guesses :
Well......I am not a very good sudoku solver....but dnt know how i solved this sudoku in around 13 minutes....used couple of guesses and it worked for me...LOL