Are you ready for the next great Sudoku challenge? Killer Sudoku is here and it is one of the hardest puzzles you will ever encounter ( 480 puzzles inside )! You have enough of these mind-blowing puzzles to keep you occupied for hours, days, weeks and even months. With grids covered by cages, each of which enclose 2 or more cells, this devilishly difficult puzzle will take your concentration and deductive powers to whole new levels. Are you ready...
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