Prime-Co Blocks
(Published on 13. November 2021, 21:00 by XeonRisq)
- Normal sudoku rules apply.
- Prime-Co Blocks: Cages are to contain one Prime digit and one Composite (non-Prime) digit. The digit "1" is excluded from both the Prime and Composite sets of digits and will be left out of all cages.
- The number in the top left corner of the cage will be the difference of the two digits in the cage.
- Example: If a cage contains (4:Composite and 3:Prime) then the cage total would have to be 1. (4-3=1)
- The numbers outside of the cages will sum to 54. (Puzzle difficulty is somewhere between 3 and 4, but I will start it out at 3 until ratings take over.)
- F-puzzles link - link to solve online
Solution code: Row 6 followed by Column 9
Comments
on 26. November 2021, 17:15 by PrimeWeasel
Very enjoyable, not too hard!
-----
Thanks PW, for trying this intro puzzle and the kind words.
on 21. November 2021, 19:30 by Emphyrio
Lovely puzzle, quite easy, and a nice ruleset with potential.
-----
Thanks for giving this puzzle a try, and the feedback on the ruleset/constraint.
on 13. November 2021, 23:34 by Wampan
I completely forgot about the other way around. my bad lol
on 13. November 2021, 22:23 by BellBear
This is very smooth to solve. Thank you, XeonRisq, for setting and sharing. It's not difficult.
-----
Thanks for the feedback and the solve. I agree it's not too difficult, but you do first have to wrap your mind around the way the blocks work, so I put it at 3-star as I thought it was fair.
on 13. November 2021, 22:19 by BellBear
@Wampan: 2 and 8 have a difference of 6, 2 and 9 a difference of 7.
on 13. November 2021, 22:11 by Wampan
This puzzle has a flaw in the cage numbers. The largest prime number in sudoku is a 7. If you cant use a 1 in the box, then the largest difference is a 5. Your cages have 6s and 7.
-----
It is a bit trickier than thinking about odds/evens, but BellBear gave good examples above.
