Comments on: Killer Sudoku Multiplication http://www.garethmoore.co.uk/2009/04/killer-sudoku-multiplication/ Puzzle and brain-training author Sun, 10 Mar 2013 11:39:58 +0000 http://wordpress.org/?v=2.8.4 hourly 1 By: Spittledung http://www.garethmoore.co.uk/2009/04/killer-sudoku-multiplication/comment-page-1/#comment-66 Spittledung Sun, 10 May 2009 06:42:33 +0000 http://www.garethmoore.co.uk/?p=285#comment-66 It is different. I really like Killer Sudoku. I didn't have to do huge multiplication except to check my work. I came away with the rules of Multiples and Integer Division to speed things up. Multiples being where if the answer is 12 in 2, then the cage can have the digits: 2,3,4,6. Integer Division is to divide the answer by a potential number in the cage. If you get a remainder, the divisor digit is NOT in the cage. If you do this for known numbers in the cage, the result is now a smaller number for the remaining digits and it gets easier. After doing more of these, I can get to the point where looking at a value of some of the cages can auto-tell me the digits in the cage (just as for kakuro, 23 in 3 is 6-8-9). It is different. I really like Killer Sudoku. I didn’t have to do huge multiplication except to check my work. I came away with the rules of Multiples and Integer Division to speed things up.

Multiples being where if the answer is 12 in 2, then the cage can have the digits: 2,3,4,6.

Integer Division is to divide the answer by a potential number in the cage. If you get a remainder, the divisor digit is NOT in the cage. If you do this for known numbers in the cage, the result is now a smaller number for the remaining digits and it gets easier.

After doing more of these, I can get to the point where looking at a value of some of the cages can auto-tell me the digits in the cage (just as for kakuro, 23 in 3 is 6-8-9).

]]> By: Gareth Moore http://www.garethmoore.co.uk/2009/04/killer-sudoku-multiplication/comment-page-1/#comment-45 Gareth Moore Fri, 01 May 2009 20:26:50 +0000 http://www.garethmoore.co.uk/?p=285#comment-45 I'm going to clarify the different type of puzzles in my next blog post, which will appear at midnight (GMT) I think - I've decided that we can break the Killer Sudoku / KenKen(TM) space down into four different puzzle types. I’m going to clarify the different type of puzzles in my next blog post, which will appear at midnight (GMT) I think – I’ve decided that we can break the Killer Sudoku / KenKen(TM) space down into four different puzzle types.

]]> By: Christine http://www.garethmoore.co.uk/2009/04/killer-sudoku-multiplication/comment-page-1/#comment-44 Christine Fri, 01 May 2009 15:31:05 +0000 http://www.garethmoore.co.uk/?p=285#comment-44 At first sight, these seemed to be the same as Kenken puzzles, but having re-read the rules it's an interesting twist to note that you can't repeat digits within the cages as you can with Kenken. Makes them slightly easier as a few more options are eliminated. I see what you mean about not having to do the large multiplications - thank goodness! At first sight, these seemed to be the same as Kenken puzzles, but having re-read the rules it’s an interesting twist to note that you can’t repeat digits within the cages as you can with Kenken. Makes them slightly easier as a few more options are eliminated. I see what you mean about not having to do the large multiplications – thank goodness!

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