Sudoku Classic & Killer
Sudoku Classic & Killer - Play Online
Logic puzzle. Two modes. Sudoku Classic & Killer strips the genre down to pure number strategy. Classic grids? Check. Killer cages with sums? Double check. This is brain training without the fluff.
How to Play Sudoku Classic & Killer
The Goal: Fill the 9×9 grid. Every row, column, and 3×3 box needs digits 1 to 9. No repeats. In Killer mode? Same rules. Plus cages with target sums. Miss three times and you're out.
Pick Your Poison: Classic vs Killer
Start with Classic mode. Standard Sudoku rules apply. Tap an empty cell. Select a digit. Watch for conflicts. Killer mode adds cages. Groups of cells show a sum at the top. Your digits must hit that exact total. No duplicates inside the cage. Harder. Way harder.
The Grind: Four Difficulty Levels
Choose Easy to learn the ropes. Move to Medium when ready. Hard removes hints. Expert? That's for veterans. Each level strips away pre-filled numbers. More blanks. More thinking. New Daily Challenge drops every 24 hours. Fresh puzzle. Fresh test.
Tools: Notes and Hints
Stuck? Hit the notes button. Pencil in possible candidates. Small numbers in the corner. Keep track of options. Still stuck? Use the hint button. Reveals one correct digit. But don't spam it. You only get 3 lives. Three mistakes and game over. Make every move count.
Key Features
- Two Modes: Classic Sudoku and Killer Sudoku with sum cages.
- Four Difficulty Levels: Easy, Medium, Hard, Expert. Scale the challenge.
- Daily Challenge: New puzzle every day. Keep the streak alive.
- Notes & Hints: Pencil marks for tracking. Hints when you're stuck.
- 3-Life System: Three strikes. Game over. No second chances.
- Clean 2D Grid: Simple visuals. Zero lag. Pure focus.
Who is Sudoku Classic & Killer for?
Perfect for puzzle veterans. Great for anyone chasing brain training. Short sessions work. Long sessions work better. Endless replayability. Killer mode is for strategists who want more bite.
Release Date & Developer
Sudoku Classic & Killer was developed by TopOp Games. Released on April 15, 2026.
Controls
- Mouse/Touch: Tap a cell to select it
- 1-9 Keys/Buttons: Enter digits
- Notes Button: Toggle pencil marks
- Hint Button: Reveal correct digit
