extreme Killer Sudoku Rules
Start a fresh extreme Killer Sudoku puzzle now.
- Sudokus available
Difficulty
Extreme
Variant
Classic + Killer
Presets
para guardar tus modos de juego favoritos
- Sudokus available
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Start a fresh extreme Killer Sudoku puzzle now.
Killer Sudoku completion rate
74%
Available Killer Sudoku difficulty levels
4
Killer Sudoku games played today
0
New Killer Sudoku puzzles this week
0
Academy is a good starting point if you have never played Killer Sudoku before.
Total Sudoku games played
1,600+
Available Sudoku variants
22
Playable Sudoku pages
4M+
Sudoku Academy lessons
3+
Yes. Undo allows you to reverse recent actions, making it easier to correct mistakes without restarting the entire puzzle.
The timer tracks how long your solve takes. Some players use it to measure progress, compare attempts or simply see how quickly they can complete a puzzle.
Yes. Clear marks removes notes and visual markings when the grid becomes crowded, helping you reorganize your thinking without resetting the puzzle.
No. Notes are optional. Some players rely on them heavily, while others prefer solving directly from the information already visible in the grid.
Sudoku variants keep the familiar Sudoku grid but introduce an extra rule. That extra rule might involve sums, lines, diagonals, outside clues or special regions, creating a different solving experience.