Talk:Killer sudoku

message: The text 'below' the sample solution was appearing to the right of it - I didn't know how to fix that properly so there's an unsightly line of s in there instead. --Last Malthusian 00:32, 6 January 2006 (UTC)

message: I recently saw the term "Sumdoku" (or it might not have had the "d", and was just "sumoku"?) used in a book for the first time in my memory--but they used it for a slightly different type of puzzle.  All the killer sudoku rules applied (including no repetition of any number in any cage), except for one--there were no 3x3 cells in the puzzle, and numbers could therefore appear more than once in those regions.  (But the rule of no number appearing more than once in any row or column still applied.)
I didn't buy the book, and I don't remember who published it.  But if anyone else has seen it or can reference it, it may be worth noting...  —Preceding unsigned comment added by 67.233.237.161 (talk) 07:51, 23 April 2009 (UTC)
thread_title:  "Sumdoku" is something different? 

message: Here's a quick idea, I'm curious as to what others think of it. I play regular sudoku, not the killer version. However, it seems to me there is one important (or interesting) distinction between the two, that is not mentioned in the current article: regular sudoku is a purely logical puzzle, whereas killer sudoku is not. (I do not intend this distinction to deingrate either puzzle.) In regular sudoku, the numbers are merely symbols -- their numerical properties do not count (oops, pun!). It would be possible to play regular sudoku using any set of nine unique symbols, without changing the rules or solution strategies. However, this is not true of killer sudoku, which combines logic and math. AlistairLW (talk) 16:15, 2 January 2009 (UTC)
replies: text: Actually, I disagree to some extent. Killer is a purely logical puzzle because you can solve it purely by logical deduction. Also, I think (but I haven't tested this) that you can invert the numbers, by which I mean you can replace a "17 in 2" with a "3 in 2", a "23
in 3" with a "7 in 3" etc. along with replacing 9 with 1, 8 with 2, 7 with 3 and so on. Thus it is not completely dependent on one set of numbers. And perhaps there are other transformations possible (maybe someone who's handy with group theory might be able to work this out). But I do see your point - you could replace traditional sudoku numbers with apples, oranges etc. - I've even seen this in some children's puzzle book.--A bit iffy (talk) 19:45, 2 January 2009 (UTC)
thread_title:  Suggestion 

message: I deleted these for the moment. They take up too much space, they're not that useful, and they're ugly. Er... in my opinion :-). --Malthusian (talk) 10:00, 13 January 2006 (UTC)
thread_title:  Sum tables 

message: Following the example of the Sudoku article, I have removed the external links to sites promting their own Killer puzzles. This is because it's becoming clear there are more and more of them turning up, and they are easy to find anyway. --A bit iffy 10:12, 28 March 2006 (UTC)
thread_title: External links to sites offering puzzles

message: I've just looked at three puzzle books that include instructions for Killer Sudoku.  Not one of them mentions this rule.  Does this mean that the puzzle setters believe the rule doesn't exist, or that they merely forget to mention it?
So far, I'm yet to see a Killer Sudoku that violates this rule.  Has anyone?  Conversely, has anyone seen one that actually requires this rule for the solution to be unique? -- Smjg 18:21, 22 July 2006 (UTC)
thread_title:  "No number can appear more than once in a cage." 

message: I see that someone's added in the cage combos for 6, 7, and 8 digits. Are these really necessary? As is already stated in the article, the combinations are more easily derived by using the complement of the 1, 2, and 3-cell cage combos. (In particular the 8-digit list seems silly to me: all you need to do to figure out the missing digit is subtract the cage-sum from 45.) ND 01:53, 31 July 2006 (UTC)
thread_title:  Combinations