Clueless Phistomefel Ring
(Published on 17. June 2025, 09:56 by AlfSmith)
• Normal Sudoku rules apply.
• A gold cell contains its position within its row, column or box (in normal reading order). All gold cells are given.
For example the gold cell R6C1 is either 1 (position in row), 6 (position in column) or 7 (position in box),
and the white cell R2C8 is NOT 8 (position in row), 2 (position in column) or 5 (position in box).
Solution code: row three
Comments
on 18. June 2025, 02:23 by Fisherman
Oliver asks for more.
on 18. June 2025, 00:14 by Snaques
I think I've messed this up before as well, but somehow I just thought it was the box number, not the number within a box. Took me quite a few tries to confirm that "my way" will not work.
In the end it was quite nice, though the negative constraint was pointless like someone said.
on 17. June 2025, 19:57 by Martina
I liked the ruleset but didn't need the negative constraint. Thanks for setting.
on 17. June 2025, 17:53 by anewbis
My first puzzle ever, It took me some time and I might have not seen the quick and easy idea but I had fun solving it.
on 17. June 2025, 17:10 by Dermerlin
The negative constraint isn't necessary, or is it?
At least i didn't use it at all
AlfSmith> You are correct, this particular example of Clueless Sudoku can be solved without using the negative constraint. However the negative constraint can be used in alternative solution paths. Increasing the number of solution paths makes the puzzle easier.
on 17. June 2025, 15:55 by GeorgeTheToad2
Cool
on 17. June 2025, 14:47 by SirWoezel
@Ragna That is correct. In Row 6 it's in position 1. In column 1 it's in position 6. In box 4 it's in position 7. So it's value must be 1, 6 or 7
AlfSmith> Thank you for the explanation.
on 17. June 2025, 14:42 by Ragna
Sorry, but I do not understand the example. I've learned: R6C1 is in row 6 and in column 1 and in box 4.
