Dark Sudoku - Classic Sudoku Puzzle

Sudoku puzzle is a widely popular intellectual game. Due to its simple and friendly rules for beginners and the charm from intellectual challenge, Sudoku becomes welcome recently for players of various ages. You are even able to solve a Sudoku puzzle easily without any mathematical knowledge. Dark Sudoku has 15000 different puzzles and comes in five well-balanced difficulty levels: flash, easy, medium, hard and evil 😈. All puzzles can be logically solved. Easiest puzzles are a good start for be...