Killer Sudoku Online
Table of Contents
Killer Sudoku Solving Strategies
There are three basic methods used to solving killer sudoku puzzles.The first is to use the strategies for solving regular sudoku puzzles.The second is to consider the different ways that a sum can becreated. The third is to consider the total value of a region. Herewe outline the basic strategies and then show how they are applied ina sample puzzle. At a later date we will post more complexstrategies. (The Terminology used on this page is defined on the rules page.)Basic Solving Strategies
Enjoy an engaging Killer Sudoku experience! Jump into enhanced gameplay, solve tons of puzzles, train your brain, and have fun! Discover the new brain-training puzzle from the developer of Sudoku.com! Killer Sudoku by Sudoku.com is great for both beginners and advanced players. Although Killer Sud. Time to defeat the killer, sudoku geniuses! Same as the classic version of the number puzzle, you will be given a 9x9 grid, which is evenly divided into 9 squares. Your goal in the game is to put numbers 1 to 9 onto the blanks of the grid, such that the numbers will not be repeated in each row, each column, and each 3x3 square. Welcome to Killer Sudoku - a logic puzzle with very simple rules and challenging solutions All Puzzles February 8 February 7 February 6 February 5 February 4 February 3 February 2 February 1 January 31 January 30. Random. Killer SuDoku has arrived on this website! The SuDoku Solver now handles Killer SuDokus of all complexities. You can create, solve and analyse these puzzles just as you could before with 'normal' SuDokus. The Killer Solver is integrated into the existing SuDoku Solver. When you load a puzzle, the Solver understands which type of SuDoku it is.
The following are the basic rules used to solve killer sudokus.- Rule of 1
- This comes directly from the definition of sudoku. No region cancontain any duplicate digits. In a sudoku region each digit appearsexactly once. For example, if a digit appears in arow, it cannot be in any other cell in the row. Likewise, each digitcan appear in a cage only once. If a digit is in a cage, it cannotappear in that cage again.
- Rule of Necessity
- This rule can be applied to sudoku regions (i.e., row, column, ornonet) or to a cage. In the former case, each region must containall the digits one to nine. Thus, if all the digitsbut one appear in a row, the missing digit must appear in the emptycell.
- Rule of 45
- Each sudoku region (i.e., row, column, or nonet) contains thedigits one through nine. Thus, each sudoku region has a total valueof 45. If S is the sum of all the cages containedentirely in a region, then the cells not covered mustsum to 45-S.
- Rule of K
- The Rule-of-k is an extension of the Rule-of-1. If there are kcells contained entirely in a region that contain exactly k differentpossible values, then no other cell in that region can contain any ofthose k values.
- Sum Elimination
- This strategy examines the different possible ways of making thesum of a cage. Reducing the number of different possible ways ofmaking a sum, can often lead to a potential solution. There aremany ways of reducing the number of sums. For example, if a 2-cagehas a total of 3, 4, 16, or 17 there is only one combination of valuesthat can be used. (3=2+1, 4=3+1, 16=9+7, and 17=9+8.) 3-cages withonly 1 combination are: 6=1+2+3, 7=1+2+4, 23=9+8+6, 24=9+8+7. The sumcalculator found in the online player page canbe very handy.
more to come...
Applying the basic strategies. An Example
Here we will use the above strategies to solve a puzzle. You mightwant to print out the puzzle so you can follow along all thesteps.| Rule of 45 |
| Rule of necessity |
| Rule of 1 |
| Unique Sums |
| Rule of K |
| Rule of K Rule of 1 Limited Possible Sums |
| Remaining sum Rule of 1 Rule of K Rule of necessity |
| Sum Elimination |
| Sum elimination Rule of 1 |
| Range of Totals Sum Elimination |
| Rule of 1 Rule of necessity Remaining Sum |
| Limited possible sums Rule of 1 Rule of necessity |
| Rule of necessity Rule of 1 |
Killer Sudoku is also known as Sum Sudoku, which is a type of puzzle game that combines the features of KaKuro and Sudoku.
Just like any other Sudoku, the columns, rows, and three by three blocks consist of numbers 1 to 9.
Also, the dotted lines represent areas known as cages that contain a series of digits (non-repeated). When you sum up the numbers present in a cage, you will attain the sum displayed in the clue.
History
Http://killersudokuonline.com
- Killer Sudoku puzzles originated in Japan in the mid-1990s, and earlier, they were termed as “samunamupure.” The name – Killer Sudoku was given to the game for most English speaking countries.
- In usual Sudoku puzzles, when you look at the grid layout, it is somewhat symmetrical around the horizontal, vertical axis and diagonal axis, or you can quarter/half-turn towards the center.
- Killer Sudoku needs the player to have solver skills at mental math, and the most difficult ones take hours together to solve. So, you need to be sharp with mental arithmetic to stay in the game and solve the puzzles.
Goal
- The goal of the game is to fill in the grid using numbers from 1 to 9 in a fashion that the below-mentioned rules are followed
- Every row, column & and no net consists of every number precisely once
- The addition of all the amounts present in the cage should match the small number displayed in the corner.
- In the cage, every number appears just once means they are not repeated. It is a standard rule of Killer Sudoku, which signifies that every pen can have nine cells only.
- In this game, – ‘Killer X,’ is an added rule wherein every lengthy diagonal consists of each number just once. You need to follow the regulations and have excellent math skills to solve these puzzles.