#Sudoku strategy how to

Now by testing the number 1, the player could have been able to make a chain going through different cells. Therefore, the digit can be the solution for the particular cell. By testing the two digits, the player finds that the result for highlighted cell with candidates 5 and 7 is still 5. If a player is successful in testing, the solution is there for him to solve the Sudoku puzzle.Ĭell highlighted at the top with candidates 1 and 2 can be used to apply the forced chain technique. The objective of this strategy is to find the cell that would return the same result.

They can do so by using each of the two numbers in the cell. To apply a simple forcing chain strategy, there must be cells with only two candidates in the grid.Īs a result, the player chooses one and begins to test the changes in the puzzle. If it works for a player, then it gives the solution for a cell to the player. Unfortunately, the application of this strategy requires a high concentration level and the results can be uncertain. One of the easiest advanced Sudoku strategies is forcing chains. On the other hand, they have to remove a digit from the cell that causes impossibility in both situations. The next step in this strategy is to test the sets on the grid. The player fins only two sets of possible positions for that number. The players can use this strategy when there is a repeated candidate in four cells which form a square or rectangle. The impact of this strategy is very low and its objective is to eliminate the candidates. This strategy can be used at some intermediate levels. The X-Wing Method is one of the most basic advanced Sudoku strategies. When you research different strategies, you will know that how each strategy works and which one will be the best for you. Major Sudoku strategies can help you to improve the game. All you have to do is to research practice the strategies. Just like other games like mahjong or solitaire, you can use different strategies to increase the chances of solving Sudoku at a better level. Some major strategies can be used to improve the Sudoku game.

#Sudoku strategy how to

The number placement game can take you to a point where you don’t know how to solve the puzzle anymore.Īt the dreaded point in Sudoku, you might have thought about different strategies or maybe you erase and start over. This math puzzle has taken over the world and people are delighted with its gameplay. Whenever someone is having a downtime, they might be playing Sudoku. Many view Sudoku as a much beloved hobby as well. People play it online, in the newspaper, or when bored on a plane. The same is true for any single column or nonet - its cells, when solved, will always sum to 45.Sudoku has become a ubiquitous game in the world. Given this, if you take a single row and add together each of its cells, the answer will always be 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9, which is 45. At its heart is the rule, from Sudoku, that each row, column and nonet must contain the numbers 1 to 9 only once. The 45 RuleĪnother important strategy, which forms the basis for many others, is the 45 Rule. Let's write all that in:Īs you can see, it's very important to understand cage combinations, and finding cages with just a single combination can be a very effective way to start solving a puzzle. Looking down at the 16-cage again, that means its right-hand cell can't contain the 9, so it must contain the 7, leaving the left-hand cell containing the 9. Under the rules of Sudoku, that means there can't be another 8 or 9 anywhere else in that column. The 17-cage at the top of that section also has a single combination, 8 9. Let's write that in, again as notes, and also look a bit further up the puzzle: However, under the rules of Sudoku it can't contain a 7 or a 9, because they already appear elsewhere in the nonet - i.e. Its possible combinations are 4 9, 5 8 and 6 7. Now look at the 13-cage on the left hand side. We don't know which way around the two numbers will be, so we use pencil marks/notes to enter them into both cells - the left-hand cell can contain either 7 or 9, and likewise for the right-hand cell. The 16-cage in the bottom-left corner has just one cage combination, 7 9, so let's write it in. For example, consider this section of puzzle 15168: Tap/click on a cell, and the combinations for its cage will be shown in the Combinations box.Ī good way to start solving a Killer Sudoku puzzle is to look for cages that have just one cage combination. When you do a puzzle online with Daily Killer Sudoku, the cage combinations are calculated automatically for you.