Killer Sudoku (Killer Sudoku)
A lot has been said about Sudoku and you probably don't need it in Killer Sudoku. If you are a connoisseur and a fan of brainstorming over cells with numbers, you do not need our advice. But they will come in handy for those who first decided to tackle the famous number puzzle. The task is to fill the cells with numbers from one to nine. In addition, the field is divided by red lines, which are combined into areas. There is a number in the left corner of each red square. It means that the sum of all the numbers you bet must be exactly as indicated. These are additional conditions to the general task.