Necessity
(Published on 8. February 2026, 13:47 by Sotehr)
PUZZLE
Play [Necessity] on SudokuPad.
RULES
Sudoku: Normal Sudoku rules apply; place the digits 1-9 once in every row, column, and 3x3 box.
Summand Arrow: All the digits pointed at by an arrow always sum to a two-digit total. The two digits of that total (neither of which may be zero) sum to the digit on the arrow cell.
The border around the grid has been provided for note space.
Summand Arrow: All the digits pointed at by an arrow always sum to a two-digit total. The two digits of that total (neither of which may be zero) sum to the digit on the arrow cell.
The border around the grid has been provided for note space.
NOTES
Expected Difficulty: 3.5 stars
For example, if an arrow cell contains a 4, then the sum of the cells seen by that arrow must be a sum of 13, 22, or 31.
For example, if an arrow cell contains a 4, then the sum of the cells seen by that arrow must be a sum of 13, 22, or 31.
Solution code: Row 6.
Last changed on on 10. February 2026, 18:35
Solved by Piff, bansalsaab, efnenu, Exigus, SKORP17, lmg131, SpringPeonies, zeniko, Felis_Timon, Neumino, EDL, marcmees, Joschua, kasperd
Comments
on 10. February 2026, 14:01 by marcmees
With basic mathematics, nice but not that hard. Enjoyed that. Thanks
on 10. February 2026, 00:32 by EDL
Nice and original ruleset, definitely enjoyed the solve
Thanks for the puzzle!
on 9. February 2026, 02:26 by SpringPeonies
Thank you for the puzzle it was very fun
on 8. February 2026, 20:03 by Exigus
I definately needed some notetaking. Very interesting ruleset. Thanks!
