At long last, I just uploaded my first ever Killer Samurai Sudoku.
As all our other puzzles – it’s PERFECT ;). Why:
1. It has one and only one solution. If you claim differently – triple check all the rules that apply.
2. This solution can be found by logic only – no trial and error is needed.
3. It’s symmetrical. (Killers are 2-way symmetrical, while other overlapping puzzles can be made 4-way or 2-way symmetrical)
4. There are no singleton cages.
This puzzle should take you through the weekend. Let me know how difficult you find it.
UPDATE: I moved the puzzle and attached it to this message.

(click to download or right-click to save the image!)

I have been providing these puzzles for FREE since 2005. Please consider clicking this “Like” buttonClicking it will help in keeping this website free. THANK YOU! 🙂

The symmetry is as a whole, but each individual 9×9 grid at the 4 corners are not symmetric…

An idea for djape: is it possible to construct an overlap puzzle that’s putting 4 9×9 grids together to form a 12×12 grid? And instead of naming it unimaginatively as “Quadruple Trouble” etc I suggest it be called “Butterfly” or “Butterfly X” (shaping like 4 wings of a butterfly). Just a thought…

ArgonO, yes, the puzzle is 2-way symmetrical (diagonally symmetrical, to be precise). So, if you cut it on the diagonal and rotate one half by 180 degrees you will get the same shape as in the other half.

All Killer Sudoku puzzles posted here are symmetrical in the same way.

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I can’t find where to download Killer Samurai for Dec 16. What do I click on?

Nicole, it’s on the “Daily Killer” page… or to make it easier for you, here is the link:

http://www.djape.net/download/killer/killersamurai20051216_0.png

Enjoy!

Nice one djape.

Took me a while to solve it, but was pretty straight forward, just LONG….

BTW I can’t see the symmetry….

The symmetry is as a whole, but each individual 9×9 grid at the 4 corners are not symmetric…

An idea for djape: is it possible to construct an overlap puzzle that’s putting 4 9×9 grids together to form a 12×12 grid? And instead of naming it unimaginatively as “Quadruple Trouble” etc I suggest it be called “Butterfly” or “Butterfly X” (shaping like 4 wings of a butterfly). Just a thought…

Merry X’mas & Happy New Year to all!

Udosuk, I think it is possible. Check the “Daily Sudoku” page for confirmation. 🙂

ArgonO, yes, the puzzle is 2-way symmetrical (diagonally symmetrical, to be precise). So, if you cut it on the diagonal and rotate one half by 180 degrees you will get the same shape as in the other half.

All Killer Sudoku puzzles posted here are symmetrical in the same way.

Ah, rotationally symmetrical – now I understand…

That was hard…

I had to resort to possible sums more than a few times, but I got there in the end.

Not looking forward to the Christmas Killer…

LA