How Many Primes Fit In A Box?
(Published on 22. June 2025, 05:00 by Will Power)
Solution code: Row 8.
Comments
on 21. March 2026, 10:25 by atheeromar
SudokuPad solution link:
https://sudokupad.app/79rixvjdfc
Great one! However -for me at least- the puzzle had 2 possible satisfying solutions. With 24 entries to go, i was able to choose either without breaking the rules. The solution link above was for the one approved by the solution code.
I saved a screenshot from where a path could be chosen. Link for the unapproved path is:
https://sudokupad.app/q8hj14qpxw
@atheeromar Thanks so much for playing and commenting. I appreciate when people find alternate solutions and challenge my logic. Unfortunately, the top left cage sums to 21 in your alternate solution, and 21 is not prime. Otherwise, you were extremely close to being correct. As of now, I continue to believe my solution is unique. Peace to you. -Will Power
@Will Power thank you for taking time in verfing my "challenge". Next time I will try to be more careful before claiming two solutions. What I´m wondering about is how you managed to verify the solution by just using the solution link. Is there a way to extract the solution?
on 21. July 2025, 23:17 by Ragna
Beautiful puzzle! That was much fun to solve. Thank you. :-))
on 27. June 2025, 20:34 by yusuf17
Strange thing: the final solution seems to have an pair of adjacent cells with a 1 and a 9.
I had overlooked this rule and ended up with a deadly pattern involving six cells in the first 3 columns.
Then I checked the rules again and saw the 1-9 rule.
Strange.
@yusuf17 Please don't overlook any rules. The puzzles we create have a unique solution when ALL of the rules are obeyed. I cannot control the output of your work when you do not take all rules into account. Peace to you. -Will Power
on 22. June 2025, 06:29 by VitP
FIRST
very intricate, but still pretty easy, because each arrow or cage can be solved IN ISOLATION, until you are close to the end.
hint: two secrets plus the answer = an important result.
