Blocks with Benefits
(Published on 7. January 2022, 02:00 by XeonRisq)
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I have recently been working with Prime-Co blocks to further it's flexibility and have decided to change it's look to accommodate. Instead of a cage with a total in the top left corner, it will now be a cage with a difference circle between the two cells within. The number placed in the circle will provide the difference between the two digits.
- Rules:
- Normal sudoku rules apply.
- Friendly Cells: A friendly cell is a cell that contains a digit that matches it's row, column, or box. (For example, r5c9 would contain either 5 (row), 9 (column) or 6 (box) if the cell is a friendly cell).
- 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 set of digits and will be left out of all cages.
- The number in the circle between the two cells in a cage will be the difference of the two digits in the cage, if given.
- Each cage will contain either ALL friendly cells or NO friendly cells.
- F-puzzles link - link to solve online
- CtC link - link to solve online
Solution code: Row 4 followed by Column 4
Comments
on 9. January 2022, 08:34 by Bankey
Interesting new variant ! Needs complete attention else so easy to mix up two different kinds of parity. Thanks for the puzzle, @XeonRisq :)
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Thanks for giving the puzzle a try and the great feedback. I think with any unknown constraint, it seems awkward and foreign early on, but a few puzzles solves with it and it becomes more familiar.
on 7. January 2022, 04:37 by ScatterBrain
Unusual rules. It's hard to keep track of who is friendly. Interesting! Thanks.
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Thanks for trying the puzzle and pushing through to completion. Appreciate the solve and the feedback.
I agree with the tracking of the cells, though I found that over time, I got used to each cell's friendly values.
