Prime Clover
(Published on 28. November 2022, 23:17 by Totox00)
Normal Sudoku rules apply. The sums of the digits along a line in a 3x3 box must be a prime number. Sums cannot repeat along a line. (note: 1 is not prime) For example, a line containing 25|5 (the | separates 2 regions) would be allowed since both 7 and 5 are primes, but 23|5 would not be allowed since the same line would have 2 regions sum to 5.
f-puzzles CtC (alternate line colour)Solution code: Row 6 (left to right) Column 6 (top to bottom) (18 characters total)
Comments
on 12. March 2024, 20:44 by ThymePass
That was a very novel puzzle for me and a fun solve. Thanks for setting this :)
on 27. February 2024, 17:05 by Totox00
Fixed formatting
on 22. March 2023, 18:20 by zrbakhtiar
Useful if you know the parity of almost all prime numbers.
on 3. December 2022, 13:15 by Totox00
Added an alternate colour option for the CtC app
on 3. December 2022, 07:35 by obi
Loved the logic flow! Only thing I'd note is that this particular purple is difficult when using pencil marks on CTC software. :)
on 3. December 2022, 00:10 by chain.reader
minor side-note for those without perfect vision (like me) ... thick purple lines make blue pencilmarks very difficult to read.
on 29. November 2022, 13:04 by Totox00
Added example for the "Sums may not repeat" rule
on 29. November 2022, 01:17 by asp1310
Here it says “sums cannot repeat”, on CTC it says “primes cannot repeat”...which is it? And whichever it is, what does that even mean? Does that mean each prime digit can only appear once on each line (I.e. both r1c456 and r23c7 can total to 13, but 2,3,5&7 cannot repeat along the line), or that the prime total has to be different for each box along a line (I.e. if r1c456 totals to 13, then r23c7 cannot, though both may use the digit “5” in their sums).
