Prime X-Sudoku
(Published on 24. March 2020, 12:44 by SirWoezel)
In this puzzle, normal Sudoku-rules apply. The numbers 1 to 9 also appear on both diagonals.
Apart from that all the coloured areas add up to a prime numer and do not contain the same digit more than once.
The five 'boxed' cells (C2, C6, C8, D4, F6) are not primes.
Of the four short diagonals (a, b, c and d) only one adds up to a prime.
Have fun,
Michiel
Solution code: Row 8, Column 6
Comments
on 4. April 2020, 17:12 by tuace
A bit confusing, but really nice solving path.
on 25. March 2020, 23:48 by zuzanina
It couldn't be a coloured region, because it contains 9 digits... ;-)
So single white cells can also contain prime or non prime digits.
on 25. March 2020, 23:21 by SirWoezel
Hi Geronimo. No, I did not intent that to be a ‘coloured’ region.
on 25. March 2020, 22:39 by geronimo92
Just a question please : the white area on the left has to be a non repeated digit region too?
on 25. March 2020, 06:41 by Joe Average
Thanks. I later realized the single cells had to be regions on their own, but was still unsure about the red ones.
on 24. March 2020, 23:43 by SirWoezel
Hi Joe, sorry this is not clear. Cells that have the same colour AND touch orthogonally belong to the same region. So c8, d7, d8, e8 and f8 form a region and c4, c5 and c6 form another region. And -for example- e7 is a region all by itself.
on 24. March 2020, 20:27 by Joe Average
I'm having Troubles identifying which cells are supposed to belong to the same Region. For example, to which Region does C7 belong to? Or E5 and E 7? Is it one or two red areas?
on 24. March 2020, 14:02 by SirWoezel
Maybe this will work?
on 24. March 2020, 13:08 by SirWoezel
Added a tag
on 24. March 2020, 12:59 by SirWoezel
Only added a tag to see if that gets my puzzle in the list of sudoku-puzzles
on 24. March 2020, 12:59 by SirWoezel
Added a tag to see if that gets the puzzle in the list of sudoku-puzzles
on 24. March 2020, 12:57 by SirWoezel
Added a tag to try to get the puzzle in the list of 'Sudoku puzzles'
