Place the numbers 1 to 9 once in each row, column, long diagonal and 3x3 box. Obviously, the central yellow-coloured 3x3 box is common to both grids.

The number in the cage (or shaded area) represents the result of an arithmetical operation by its accompanying sign. For example, 4÷ in a two-celled cage means that it contains either 8 and 2 or 4 and 1 (in any order).

Unlike Killer Sudoku, the same number may appear more than once in a cage. So, 28x in a cage which overlaps the 3x3 grids may contain two 2s and a 7.

Once again, I wish to thank brianjn most sincerely for his continued support. He converted my black and white Excel image to a coloured one in 'jpg' format.
Acknowledgement to Peter at sudexel.com for beta testing the puzzle.

(In reply to re: Hint by Josie Faulkner)

Hey Josie,

 

Thanks for welcoming me back.  Every once in a while I poke my head over to see what is new at perplexus, and if the puzzle I see is one of yours I am immediately sucked back in =)  They are just so fun!

 

I really like your semi-recent (at least to me) addition of the dots that serve as a reminder of the long diagonal rules.  I know we've "talked" before about forgetting the diagonal rule, so I wanted to let you know the dots are very effective.  It's even to the point that when I am doing a normal sudoku in my book, I catch myself incorrectly applying your diagonal rule =)  So the dots are actually beyond effective!

 

Take care!

Edited on June 25, 2008, 12:30 pm

Posted by nikki on 2008-06-25 12:30:00