Butterfly Killer Samurai Sudoku (#3 I think)

Weekend Special: Butterfly Samurai Killer Sudoku with diagonal cages! This puzzle consists of 20 (twenty) 9×9 Sudoku sub-puzzles. There are 5 groups of 4 puzzles. Each group of 4 is arranged Butterfly-style, and those 5 groups are arranged Samurai-style. Please make sure you understand how the puzzles are arranged before attempting to solve the puzzle. Also, be careful when solving this one – with diagonally adjacent cells it’s sometimes easy to miscount the number of cells in a cage and if you do that, you get the cage-sum combinations completely wrong! Butterfly Killer Samurai Sudoku – Sunday, March 11, 2007 – Difficulty: HARD
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Killer Samurai Sudoku books
To see the solution to this puzzle click here
Enjoy!
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6 Comments

  1. Scott Urman
    Posted April 11, 2007 at 2:11 am | Permalink

    I just have to say that I’m really enjoying solving this puzzle. I’m about 1/2 way through now after 2 days! Keep up the great work, I like the variations.

  2. Paul Smith
    Posted April 30, 2007 at 10:11 pm | Permalink

    I am struggling with this. My main problem is on the 12 line down. I make the numbers in the 13th, 14th and 15th cell from the left to be 1,2,and 3 (no particular order) but that would make the numbers in 22nd, 23rd and 24th cells from the left 1,2,and 3 (again in no particular order) but the total is at least 10. Where have I gone wrong?
    Many thanks
    PAul

  3. Paul Smith
    Posted May 1, 2007 at 1:49 pm | Permalink

    Its because the puzzle doesn’t follow the conventional rules. There are two one on the long line. No wonder I couldn’t do it.

  4. Tim
    Posted June 28, 2007 at 11:01 pm | Permalink

    I’m 2/5 of the way done… this is awesome!!, there is a slight problem with E2, E3, G2, G3 of the center puzzle… you can rearrange the 1/4 so that there is more than one correct answer… however i solved this problem by making an “imaginary” sudoku grid using one existing grid and two emptys and assuming that the numbers should follow normal sudoku rules within the imaginary grid… i get the “correct” answer in the answer puzzle when i do this. Is this how it is supposed to be figured out? or is there an error in the puzzle? thanks!

  5. Posted June 29, 2007 at 12:29 am | Permalink

    Tim, I don’t quite understand what you are saying. There are no imaginary grids. There are 5 groups with 4 sub-puzzles in each one of them. The whole puzzle has one solution, while each of the 20 sub-puzzles could have multiple solutions when solved separately from the rest.

    It is best to post your question in the forum: http://www.djape.net/sudoku/forum

    Good luck! 🙂

    Djape

  6. Tim
    Posted June 29, 2007 at 2:40 pm | Permalink

    Nevermind, I see what I did wrong… Awesome puzzle by the way!

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