![]() For subtraction and division you should start with the largest value in the cage and then subtract/divide by the rest. This will help you to quickly note all possibilities for any given cage when solving a Killer Sudoku puzzle. So in these puzzles you have all the regular Sudoku rules - placing each of the numbers 1 to 9 into the rows, columns and bold-lined boxes - but also the dashed line cage logic. And finally Mystery Killer Sudoku hides all the +, -, × and ÷ signs and makes you work out for yourself which one applies!Ī key difference between Killer Sudoku puzzles and Calcudoku/Ken Ken™ puzzles is that you cannot repeat a digit in a cage, so if you have a cage summing to 6 then the solution cannot ever be 1+1+4, for example. Killer Pro adds subtraction, multiplication and division into the mix. In Mystery Killer Sudoku Pro you have all the challenge of Killer Sudoku Pro but with the mystery of not knowing what operation applies to each cage!īasic Killer Sudoku adds to regular Sudoku with the addition of cages that must sum to a given value. These are digits that must be present somewhere within a cage for a given sum.Also known as: Mystery Killer, Killer Pro, KenDoku™ These are all possible combinations of digits for a given cage size and sum. Looking for some excellent killer sudoku puzzles? We have plenty of lovely killer sudoku books to keep you busy! Cell Cage Combinations ![]() New to killer sudoku? Be sure to check out our Killer Sudoku From Scratch tutorial. For us, puzzles like killer sudoku are all about the logic and not an exercise in memory or recall. The number at the top of the first box of each dotted region corresponds to the sum of the digits of the boxes of that region. Is it cheating? We call it a cheat sheet, but is it really cheating? Only you can decide! Our view is that a reference like this is no more cheating than using a dictionary to check your spelling. Sudoku Killer Rules: The goal is to fill the grid, so that each row, each column and each region of 3x3 boxes contains all the numbers from 1 to 9. Knowing these is a great way to eliminate candidate numbers from blocks, rows, and columns. ![]() Some cells always require particular digits, regardless of the number combination that goes into them. Unless you have a photographic memory though, you probably won’t memorise all of them, which is why this cheat sheet can be handy.Īs well as cell cage combinations, we've included required digits further down. Remembering common unique combinations is essential if you want to improve your time for solving killer sudoku puzzles. Knowing the combination of digits that can fit into a killer sudoku cage isn’t just a useful technique, sometimes it is absolutely necessary in order to solve or start a puzzle. ![]()
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