Killer Sudoku Tips Combinations

You will learn a variety of new solving techniques with many opportunities to practice the new techniques you ve learned.

Killer sudoku tips combinations. Killer sudoku cage combination reference below are all possible combinations of numbers that can be placed in a killer sudoku cage given the cage size and the cage total. This will help you to quickly note all possibilities for any given cage when solving a killer sudoku puzzle. A very useful tip is that the sum of all. The numbers shown in green are those where there is only one combination.

A new killer sudoku every day approach to daily 1271. Try to find cages with very low or very high sums. These clues are sometimes the only way you can start a puzzle so these combinations are worth remembering. In the above puzzle there are several of these e g.

This uses the fact that every row column and block must contain each of the numbers 1 to 9 once. The second is to consider the different ways that a sum can be created. To get started on this puzzle the extended rule of 45 needs to be applied. A good way to start solving a killer sudoku puzzle is to look for cages that have just one cage combination.

Take the first column of the killer sudoku shown in figure 1. The 16 cage in the bottom left corner has just one cage combination 7 9 so let s write it in 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. First try to find cages with only one cell. An essential killer sudoku solving technique is the 45 rule.

The third is to consider the total value of a region. The red blue. The 2 already filled in. The more extreme high or low a sum is the fewer possible combinations of numbers there will be.

By looking for cells with few combinations throughout a puzzle and working out what that must mean for the rest of the puzzle you will have taken an important step towards successfully solving a killer sudoku puzzle. Therefore the total of all numbers in one row column or block will always be 45. Play our killer sudoku puzzles or view more killer sudoku tips. With the introduction of killer sudoku you can train both your logic skills and your mental arithetics this guide introduces you to the strange world of killer sudokus.

For example consider this section of puzzle 15168. The numbers in this column. We can now fill in some cells due to the fact that 87 cannot be in any of the other cells in the 6th column. Killer sudoku solving strategies there are three basic methods used to solving killer sudoku puzzles.

Here is an approach to daily 1271.