You can use the Calculator to work out the cage combinations for any cage - even one that isn't in the puzzle. Just enter the cage's size (number of cells) and sum. This is a fantastic technique to jumpstart the game and place some of the first numbers on the grid. Once you have them, you can continue unraveling the ball and placing more and more numbers. Why you should play Killer Sudoku Notes/pencil marks are small numbers that you can enter into cells when you aren't yet sure of the final answer. Expert Killer Sudoku levels are definitely not for the puzzle games rookies. The thing is that in the beginning of the game you don’t have any numbers on the grid at all. This makes it tremendously difficult for people unfamiliar with at least basic Killer Sudoku strategies and techniques. On the other hand, if you’re a sudoku veteran, feel free to challenge your skill! Expert Killer Sudoku Tips These are all possible combinations of digits for a given cage size and sum. Bolded sums have only one combination. 2-Cell Cage Combinations

I've made a lot of improvements and I'll continue to make them over time, so hopefully any differences should become fewer and further between! Why can't I see printable puzzles? Looking at the nonet on the left hand side in the middle, we can see that there are three cages which do not cross over into another nonet; these add up to 33, meaning that the sum of the remaining two cells must be 12. This does not seem particularly useful, but consider that the cell in the bottom right of the nonet is part of a 3-cage of 6; it can therefore only contain 1, 2 or 3. If it contained 1 or 2, the other cell would have to contain 11 or 10 respectively; this is impossible. It must, therefore, contain 3, and the other cell 9.

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The “Greater Than” Killer sudoku take killer sudoku to a new extreme. Some of the cages have no sum value attached. You must determine what the individual cells in the cage sum to by looking at surrounding regions. If there are relations between the cages (e.g., >, <, or =), the cages will obey those relations. Beware, these puzzles can be very hard! The two cells in the top left must be 1+2. The 3 cells to the right totaling 15 cannot therefore have either a 1 or a 2, so they must be either 3+4+8, 3+5+7, or 4+5+6. This can happen with multi-cell selection. It means that some of the highlighted cells contain the value and some don't. So, for the button above, only some of the highlighted cells contain a 6. With 6-cell, 7-cell or 8-cell cages, correlating the combinations with their 3-cell, 2-cell, or 1-cell complements usually simplifies things. The table for 6 cell cages is the complement of the 3 cell table adding up to 45 minus the listed value; similarly, the 7 cell table complements the 2 cell table. An 8-cell cage is of course missing only one digit (45 minus the sum of the cage). Killer Sudoku is a fun twist on the classic sudoku for those of you seeking something new and challenging. It’s also known by such names as sumdoku, addoku and sumoku puzzle but in a nutshell it’s pretty much the same number puzzle. What’s the difference between Sudoku and Killer Sudoku?

Killer Sudoku is a great number puzzle that has all the best from the two worlds – Sudoku and Kakuro games. Since you’re reading this article, you’re probably a Killer Sudoku expert and there’s no need to elaborate on the rules in detail. Terminology [ edit ] Cell A single square that contains one number in the grid Row A horizontal line of 9 cells Column A vertical line of 9 cells Nonet A 3×3 grid of cells, as outlined by the bolder lines in the diagram above; also called a box Cage The grouping of cells denoted by a dotted line or by individual colours. House Any nonrepeating set of 9 cells: can be used as a general term for "row, column, or nonet" (or, in Killer X variants, "long diagonal") Rules [ edit ] Initial analysis of the sample problem [ edit ] The sample problem Fewest possible combinations [ edit ] If you sign into your online account on multiple devices - your desktop and phone for example - and open the same puzzle on both, only the one that opened it last will be able to save it. Killer sudoku puzzles were already an established variant of sudoku in Japan by the mid-1990s, where they were known as "samunamupure." The name stemmed from a Japanized form of the English words "sum number place." Killer sudokus were introduced to most of the English-speaking world by The Times in 2005.

When the highlighted cells all belong to the same cage, the Combinations control shows its cage combinations. It updates automatically as you move between cages. No number appears more than once in a cage. (This is the standard rule for killer sudokus, and implies that no cage can include more than 9 cells.) For example, consider a 2-cell cage with a sum of 5 - its cage combinations are 1 4 and 2 3. If fill uses cage combinations is enabled, the FILL button will only add the numbers 1 2 3 4 to cells within the cage. Multi-cell selection For example, the complement of a 7-cell cage totalling 41 is a 2-cell cage totalling 4 (because 9–7=2 and 45–41=4). As a 2-cell cage totalling 4 can contain only 1 and 3, we deduce that a 7-cell cage totalling 41 contains neither 1 nor 3.

These are digits that must be present somewhere within a cage for a given sum. 3-Cell Cage Required Digits Using normal arithmetic, those add up to 53. A single nonet totals 45, so the 'outie' must contain an 8. You earn a point for every puzzle you've solved. At various levels - 1 puzzle, 10 puzzles, 25 puzzles, etc. - your avatar will be adorned with a new badge in recognition of your achievement. Killer sudoku (also killer su doku, sumdoku, sum doku, sumoku, addoku, or samunamupure) is a puzzle that combines elements of sudoku and kakuro. Despite the name, the simpler killer sudokus can be easier to solve than regular sudokus, depending on the solver's skill at mental arithmetic; the hardest ones, however, can take hours to solve. Pressing a split button will add the value to the highlighted cells that don't already contain it. Can I solve the same puzzle on multiple devices?

Greater Than Sudoku for 11/25/2023

In the early stages of the game, the most common way to begin filling in numbers is to look at such low-sum or high-sum cages that form a 'straight line'. As the solver can infer from these that certain numbers are in a certain row or column, they can begin 'cross-hatching' across from them. If cage combinations are included, the Undo button undoes the last cell change and all changes to cage combinations since the previous cell change. In other words, it (a) undoes all changes to cage combinations since the last cell change, (b) undoes the last cell change, and (c) undoes all changes to cage combinations since the previous cell change. How Am I Doing? Although both number puzzles share a lot of similarities, there’s also a major difference – amount of arithmetics involved.