Mod 10 Lines
(Published on 13. February 2026, 12:35 by pagedo)
Normal Sudoku rules apply.
Mod 10 Lines:
All lines in this puzzle are Mod 10 lines.
In this puzzle, all Mod 10 lines start and end with zeros outside the solution grid.
The next digit along a Mod 10 line is calculated by adding the 2 previous adjacent digits and taking Mod 10 of the addition. For example 5 + 1 gives 6, while 5 + 8 gives 3. The line only works in one direction - the direction is to be determined by the solver. All digits inside the grid are from the digits 1 to 9.
Digits in cells joined by an X sum to 10. Digits in cells joined by a V sum to 5.
Not all Xs or Vs are necessarily given.
ADDITIONAL MOD10 LINE INFO:
There are 11 possible unique Mod 10 sequences. Of these 11 sequences, 9 start and end in zero - 5 of which are used in this puzzle. The other 2 Mod 10 sequences, repeat the sequence and never include a zero. Neither of these 2 Mod 10 sequences are used in this puzzle.
The 2 distinct patterns of digits for the start and end with zero sequences is fairly easy to determine.
Solve with SudokuPad
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Hope you enjoy it. Feel free to give feedback.
Thanks
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Solution code: Row 5 digits
Comments
on 13. February 2026, 14:46 by RailMan
That was a very nice idea and a lot of fun. Thank you.
on 13. February 2026, 14:13 by wuc
Cool snack, sth new to me. I ignored the theory about how many lines and started by my own ideas how to approach it and it was great fun to deduce the logic. Thx for sharing.
