![]() ![]() You'll see that the third cell has only one possible number, so fill in a 2.Ĥ.Scan the fourth row. You'll notice that the fourth cell has only one possible number, so fill in a 6.ģ.Now scan the second column. You'll notice that the first cell has only one possible number, so fill in a 5.Ģ.Scan the second row. Here's an example of how to solve a level 9 Sudoku puzzle:ġ.Start by scanning the first row. Use pencil marks to keep track of all the possible numbers for a particular cell.ĥ.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.Ħ.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. These techniques are too complex to explain in detail here, but there are many online resources that can help you learn them.Ĥ.Keep track of possibilities: In some cases, there may be multiple possible numbers for a cell. ![]() Eliminate those numbers from the other cells in the same row, column, or 3x3 box.ģ.Use advanced techniques: Level 9 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. Fill in these cells.Ģ.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. Here's how to solve a level 9 Sudoku puzzle:ġ.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. These puzzles have more empty cells at the start and require more advanced logic to solve. Sudoku puzzles at level 9 are considered to be of medium difficulty. So why not try our Level 9 Sudoku puzzles today and see how far you can go? Whether you're a beginner or an experienced player, Sudoku99 has a range of puzzles to suit your skill level. ![]() Playing Sudoku online is a great way to relax and exercise your brain at the same time. But with some practice, you'll soon be able to master these techniques and solve the puzzle. You will need to use advanced strategies such as X-Wing, Swordfish, and XY-Wing to solve our Level 9 puzzles. Our Sudoku puzzles are designed to be challenging, but not impossible. 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. With fewer numbers already filled in, these 9x9 grid puzzles will test your logic and deduction skills.Īt Sudoku99, you can play Level 9 Sudoku puzzles online for free. Below a list of solvers for a number of different types of sudoku's.Sudoku Level 9 puzzles are the perfect challenge for anyone who has some experience with solving Sudoku puzzles. In the course of time all kinds of variations popped up. ![]() This defines a standard sudoku, the one that can be solved automatically above. The puzzle setter provides a partially completed grid, which typically has a unique solution. The objective is to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 sub-grids that compose the grid contains all of the digits from 1 to 9. Sudoku, originally called Number Place, is a logic-based, combinatorial number-placement puzzle. ![]()
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