Sum by X and Disjoint Groups Crypto Sudoku
(Published on 15. June 2020, 11:00 by Carrick22)
Apply classic Sudoku rules : Each row, column and bold-outlined region must contain the digits 1-9 once.
In addition :
- Sum by X : Clues oustside the grid indicates the sum of the first X digits in the corresponding direction. X is the digit in the first shaded cell from that same direction.
- Offset/Disjoint Groups : No digit can appear in the same position in different 3x3 regions.
Furthermore, every Sum by X clue is crypted, thus every letter from A-J represents a digit from 0-9. Different letters represent different numbers. Letters in cells correspond to the digit in the cell. A ? can hold any value from 0-9.
Note :
- No meaningless 0s can appear in the clues (e.g. a "5" clue cannot be written as "05").
- The number AB represent the number for which A is the tens digit, and B the units. It does not means A*B.
You can find other Crypto sudokus I made here :
You can use Penpa-edit for solving it on your browser. Here is the puzzle with a reference table to keep track of the values.
Solution code: Row 4, followed by column 6.
Comments
on 28. October 2022, 16:07 by ndsurgenor
Love the cryptic letter concept and the logic of that. Disjoint cells were a bit tiresome in terms of scanning but everything else really good!
on 15. June 2020, 16:18 by Mosti_Mo
Nice, thanks :)
on 15. June 2020, 12:21 by Carrick22
@Mosti_Mo Consider a 3x3 region with its cells. You can take the middle cell for example. If you place X in the middle of one box, X can no longer be placed in the middle of any other 3x3 box. This applies to each cell in 3x3 regions. http://www.cross-plus-a.com/fr/sudoku.htm#Sudoku-DG (The page may be in french, but the picture is here)
@marcmees The Sum by X variant often uses a pattern of shaded cells along the main diagonals (to form an X). Digits may repeat along the diagonals. It does leave shaded cells useless in some cases.
on 15. June 2020, 12:06 by Mosti_Mo
@Carrick22: what do you mean with "Offset/Disjoint Groups : No digit can appear in the same position in different 3x3 regions."? Can you provide an example please? thanks
