![]() ![]() This operation instruction can be applied to all online games on this website, including Sudoku, Jigsaw Sudoku, Mini Sudoku, Diagonal Sudoku ,and so on. Buy now for free delivery, store collections and returns. If all selected grids or some of selected grids contain a certain number (such as "5"), pressing "5" will only delete candidate number 5. Shop clothing, home, furniture, beauty, food, wine, flowers & gifts. While selecting more than one grid, please note that only when all selected grids do not contain a certain number (such as "5"), pressing "5" will add a candidate number "5" in all selected grids. Under the pencil mode, you can select multiple grids at the same time. Each document has 8 sudoku puzzles, and the end of each document is the answer to the sudoku puzzles. There are 5 difficulty levels, sudoku for kids,easy,hard,expert and extreme sudoku puzzles. Pencil mode is also called note mode or candidate mode. There are a lot of sudoku puzzles for download. By pressing this button, you can switch to pen mode. "Pencil" mode,indicate that the current operation mode is "pencil" mode. By pressing this button, you can switch to pencil mode. ![]() "Pen" mode,indicates that the current operation mode is "pen" mode. When you re-enter the game next time, the page will automatically be directed to the latest step. ![]() only once in each separate column, each row and in each small 3 x 3 grid). Enter the numbers of the Sudoku grid you want to solve in the upper fields and click on. When you solve problems partially and quit the game, the game will be automatically saved. Play our web Sudoku for best eye comfort and features to enjoy Sudoku 247. 6 by 6 Sudoku solver is used in the same way as the standard one. "Reset" button: this will clear all input (pen and pencil marks) displayed in the grid. Resetting the game will clear all saved data. If you find out that you make a mistake, you can always go back to previously saved steps by pressing “Undo” and “Redo” buttons. There are also two examples which show the pitfalls of Uniqueness strategies - and how they do not always apply in the case of Sudoku X.During the game, each step will be automatically saved. Some of the basic strategies are illustrated after the examples and show how they can be extended to the diagonals. As the grade increases the diagonals contain much more important information. Gentle puzzles should require little to no note taking and can often be solved with normal ‘eye-balling’ techniques. This rule is in proportion to the difficulty. But to complete tough and harder puzzles the solver must be expected to use the extra diagonals. In Sudoku X all the normal Sudoku strategies apply - and there are a great number of these. The main difference in the X-Sudoku is that you can not repeat numbers in either of the two main diagonals of the grid that you will see marked in orange. ![]() Note, it is perfectly possible to create a normal Sudoku that co-incidentally has the unique 1 to 9 in each diagonal but unless this information is revealed first it is usually of no help to the solver. Sudoku X is played exactly the same way as the classic Sudoku, by filling in the numbers 1 through 9 in the empty fields. However, these extra constraints allow the puzzle compiler to reduce the number of necessary clues thus creating a balanced puzzle that rivals normal Sudoku in variety and difficulty. The puzzle solver can use this information to reduce the possibilities in those lines and make deductions across the the board previously out of reach in a normal Sudoku. In Sudoku X the two diagonals containing nine cells and sharing the central grid cell must also be filled with exactly 1 to 9. There are nine ‘cells’ in every row, column and box. In a normal Sudoku puzzle all rows, columns and 3x3 boxes must be filled with the numbers 1 to 9 without repeating a number. In a normal Sudoku puzzle all rows, columns and 3x3 boxes must be filled with the numbers 1 to 9 without repeating a number. This is a variant of the popular Sudoku puzzle which contains two extra constraints on the solution, namely the diagonals, typically indicated by grey cells. ![]()
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