Killer Sudoku by Sudoku.com - Daily Challenges
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1Two daily challenges from puzzle game Killer Sudoku by Sudoku.com on Android, one easy and one medium difficulty. In Killer Sudoku the numbers 1 to 9 have to be put into each row, column, and 3x3 block only once, as in regular sudoku, but the dotted areas must also total the number next to them.