The Times Killer Su Doku Book 15: 200 challenging puzzles from The Times (The Times Su Doku)

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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 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! Traditionally, as with regular sudoku puzzles, the grid layout is symmetrical around a diagonal, horizontal or vertical axis, or a quarter or half turn about the centre. This is a matter of aesthetics, though, rather than obligatory: many Japanese puzzle-makers will make small deviations from perfect symmetry for the sake of improving the puzzle. Other puzzle-makers may produce entirely asymmetrical puzzles. 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?

Initial analysis of the sample problem [ edit ] The sample problem Fewest possible combinations [ edit ] A puzzle's difficulty level is estimated when it's generated, whereas the average solving time is the result of people solving it. The difficulty calculator gets it right a lot of the time, but ultimately it's only an estimate and so there are occasional disparities.Notes/pencil marks are small numbers that you can enter into cells when you aren't yet sure of the final answer. puzzles and two “greater than” sudoku puzzles and one “greater than-killer” sudoku puzzle. You can play Even though some cages can have multiple combinations of numbers available, there can often be one or more numbers that are consistent within all available solutions. For example: a 4 cell cage totaling 13 has the possible combinations of (1, 2, 3, 7), (1, 2, 4, 6), or (1, 3, 4, 5). Even though, initially, there is no way to tell which combination of numbers is correct, every solution available has a 1 in it. The player then knows for certain that one of the numbers within that cage is 1 (no matter which is the final solution). This can be useful if, for example, they have already deduced another cell within a nonet the cage resides in as having the number 1 as its solution. They then know that the 1 can only reside in cells that are outside of this nonet. If there is only one cell available, it is a 1. 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.

Patreon is a membership platform that enables fans to financially support/reward independent content creators. If you wish to support Daily Killer Sudoku, I'd be incredibly grateful!The FILL button (or F key) enters all numbers into the highlighted cells. If fill uses cage combinations is enabled (via the Preferences menu), then it only adds numbers that appear in the respective cage combinations, otherwise it adds all numbers from 1 to 9. As you browse through the archives, you'll be able to see which puzzles you've solved and your solving times. Patreon

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? Although both number puzzles share a lot of similarities, there’s also a major difference – amount of arithmetics involved.

Killer Sudoku for the week starting 11/20/2023

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. 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).