Daily Sudoku: Very Hard
This is not for beginners. If you are looking for a relaxing way to pass the time, try our “Easy” or “Medium” levels. But if you are looking for a true test of your cognitive limits, welcome to our Daily Sudoku: Very Hard.
Every day, we release one “Very Hard” seed. It requires advanced logic, patience, and a mastery of sudoku techniques that go far beyond simple scanning.
Accept the Very Hard Challenge
What Defines a “Very Hard” Sudoku?
A common myth is that harder puzzles simply have fewer starting numbers. While true, the real difference lies in the logic required.
In our Daily Sudoku Very Hard level, you will never find a “naked single” (an obvious move) until late in the game. You will need to use advanced elimination strategies to make progress.
Required Techniques
To crack these grids without guessing, you should be familiar with:
- XY-Wing: A pattern that eliminates candidates based on three interconnected cells.
- Swordfish: A complex pattern spanning three rows and columns.
- Coloring / Chaining: Tracing the implications of a candidate across the entire board.
Why Play at this Level?
Why subject yourself to the frustration? Because the reward is worth it.
- The “Flow” State: Very Hard puzzles demand 100% of your attention. You cannot solve them while watching TV. This deep focus is a powerful way to clear your mind of daily stress.
- Global Bragging Rights: Our Daily Leaderboard shows who cracked the code fastest. Solving a “Very Hard” puzzle in under 15 minutes puts you in the top 1% of players worldwide.
Stuck? Use the “Smart Notes” Feature
Paper puzzles can get messy when you are tracking 4 or 5 candidates per cell. Our digital interface keeps your logic clean.
Use our Note Mode to pencil in possibilities. If you get truly stuck, our system can offer a subtle hint that explains the logic behind the next move, rather than just giving you the answer.
Think you are a master? Prove it. Launch the Daily Sudoku Very Hard puzzle now.