# Sudoku Level 11

## Medium 9x9 Grid Puzzles

Sudoku Level 11 puzzles are the perfect challenge for anyone who has some experience with solving Sudoku puzzles. With fewer numbers already filled in, these 9x9 grid puzzles will test your logic and deduction skills.

At Sudoku99, you can play Level 11 Sudoku puzzles online for free. Simply click on the puzzle you want to solve, and use your deduction skills to fill in the remaining cells with numbers from 1 to 9.

Our Sudoku puzzles are designed to be challenging, but not impossible. You will need to use advanced strategies such as X-Wing, Swordfish, and XY-Wing to solve our Level 11 puzzles. But with some practice, you'll soon be able to master these techniques and solve the puzzle.

Playing Sudoku online is a great way to relax and exercise your brain at the same time. Whether you're a beginner or an experienced player, Sudoku99 has a range of puzzles to suit your skill level. So why not try our Level 11 Sudoku puzzles today and see how far you can go?

## Sudoku Level 11 ( Expert : 26 hint )

1.Look for singletons: As with easier puzzles, scan each row, column, and 3x3 box to look for any cells that have only one possible number. Fill in these cells.

2.Check for pairs and triples: Similar to easier puzzles, look for pairs and triples of cells in a row, column, or 3x3 box that have the same two or three possible numbers. Eliminate those numbers from the other cells in the same row, column, or 3x3 box.

3.Use advanced techniques: Level 11 puzzles often require more advanced techniques, such as X-wing and swordfish, which involve finding patterns in the possible numbers for cells in different rows and columns. These techniques are too complex to explain in detail here, but there are many online resources that can help you learn them.

4.Keep track of possibilities: In some cases, there may be multiple possible numbers for a cell. Use pencil marks to keep track of all the possible numbers for a particular cell.

5.Use process of elimination: If you have a row, column, or 3x3 box that has all but one of the numbers filled in, then use process of elimination to figure out what the remaining number must be.

6.Repeat steps 1-5: Keep scanning the puzzle for singletons, pairs, and triples, and use process of elimination and advanced techniques to fill in the remaining cells.

Here's an example of how to solve a level 11 Sudoku puzzle:

1.Start by scanning the first row. You'll notice that the first cell has only one possible number, so fill in a 5.

2.Scan the second row. You'll notice that the fourth cell has only one possible number, so fill in a 6.

3.Now scan the second column. You'll see that the third cell has only one possible number, so fill in a 2.

4.Scan the fourth row. You'll notice that the sixth cell has only one possible number, so fill in a 3.

5.Keep repeating these steps, scanning rows and columns for singletons, pairs, and triples, and using process of elimination and advanced techniques to fill in the remaining cells.

6.Eventually, you'll have filled in all the cells and solved the puzzle! Remember, level 11 Sudoku puzzles require more advanced logic than easier puzzles, but they are still manageable with practice. Keep at it and you'll be able to solve more difficult puzzles in no time!