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Math Help - Kakoru solution techniques

  1. #1
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    Kakoru solution techniques

    has anyone discovered any interesting kakoru solution techniques? like for instance for a 4 number row of sum 30 you can only use 9876. 3 number row of 6 can only be 1 2 3. you can actually create a 'matrix' of possible rows and then rule out the ones that are logically impossible
    Last edited by mathlover10; December 12th 2012 at 12:52 AM.
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  2. #2
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    Re: Kakoru solution techniques

    A square where 3-in-2 crosses 4-in-2 must be 1, which is just a combination of your technique for listing the possibilities for rows and columns.

    Once in a while I get a row that has two squares that can be either 1 or 2 - something like (12345) (12) (1234) (1235) (12). Then none of the rest of the row can be either 1 or 2, so I can simplify to (345) (12) (34) (35) (12).

    If a row has two elements, I can often eliminate a few possibilities by just subtracting from the sum. For example if I have (23456) and (anything) that must sum to 10, I can simplify to (23456) (45678). And 5-5 is not allowed, so it simplifies further to (2346) (4678). If I later eliminate 8 from the second square, I can eliminate 2 from the first square.

    Also, if you have an 7-in-2, neither one can be 7, 8, or 9. Similarly, if you have 10-in-3, none of the three can be 8 or 9.

    - Hollywood
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