Extreme Sudoku is the magazine for sudoku enthusiasts who are looking for more challenging puzzles. Tough-but-fair, these conundrums will challenge your solving ability to the limit.
In total, there are 82 puzzles. Most are sudoku, but there are also three Kakuro, 12 X-Factor and five Killer Sudoku puzzles.
There is also a competition in each issue, with five prizes of $100.