Ripples in the Pond
(Published on 7. November 2025, 07:30 by Sotehr)
PUZZLE
Play [Ripples in the Pond] on SudokuPad.
RULES
Sudoku: Normal Sudoku rules apply; place the digits 1-9 once in every row, column, and 3x3 box.
Periodic Sums: A clue outside the grid indicates the sum of the first cell seen in its row or column and every Nth cell after, where N is the digit in the first cell. (For example, if r2c1 is a 3, then the digits in r2c1, r2c4, and r2c7 must sum to 19.)
Parity Mirror: Any pair of cells reflected symmetrically across the dashed line both contain digits of the same parity, that is they are either both odd or both even.
Periodic Sums: A clue outside the grid indicates the sum of the first cell seen in its row or column and every Nth cell after, where N is the digit in the first cell. (For example, if r2c1 is a 3, then the digits in r2c1, r2c4, and r2c7 must sum to 19.)
Parity Mirror: Any pair of cells reflected symmetrically across the dashed line both contain digits of the same parity, that is they are either both odd or both even.
NOTES
Expected Difficulty: 2 stars
Solution code: Digits in box 5, normal reading order.
Last changed on -
Solved by m0rkoli, tuturitu, Sudocorgi, MattYDdraig, fuxia, Flinty, Malakree, marcmees, SKORP17, Zibl, GaviGuy, liushong, TripleABattery, Killer-Ly , NXTMaster, Scorps, wuc, chinesemaster, katze, by81996672, ... mathpesto, owler, sedici, ankpress, QuiltyAsCharged, olliwright, aqjhs, Scojo, ThePedallingPianist, karlmortenlunna, ralphwaldo1, brimmy, Shmartus, abed hawila, galium_odoratum, Julianl, IrishDevil
Comments
on 7. November 2025, 22:12 by wuc
Great construction. Close to 3*to me. Great setting thx.
on 7. November 2025, 18:15 by Zibl
Another fantastic puzzle! Thanks for setting. :)
on 7. November 2025, 11:41 by Sudocorgi
Brilliant ruleset, thank you for setting this!
