10-Line and 9-Line No. 2
(Published on 16. May 2026, 23:23 by RailMan)
Normal sudoku rules apply. Place the digits 1 - 9 once in every row, column and box.
The line is both a 10-Line and a 9-Line.
10-Line: The line can be divided into non-overlapping segments such that each segment sums to 10. Every cell on the line must be part of exactly one segment.
9-Line: The line can be divided into non-overlapping segments such that each segment sums to 9. Every cell on the line must be part of exactly one segment.
Solve Online : Solution Check is enabled
This puzzle uses a bit of math. If you need a hint then select the text behind the grey boxes below.
Hint 1: The sum of all the digits on the line must be divisible by 9 and 10. This means the total must be 90, 180 or 270.
Hint 2: Every 10-sum must be have at least 2 cells in it.
Solution code: Row 9
Comments
yesterday, 16:42 by Snookerfan
Very nice! Needs some thinking before starting, but then it becomes really smooth. 3 or 4 stars for the break-in, 1 or 2 for the rest of the solve. Thanks
RailMan: Thank you. I wanted people to think a lot about what that line means and the rest is just easy sudoku
yesterday, 00:02 by TeddyKwondo
Tough logic, but when you figure it out, it flows like no puzzle I have ever played before! Wonderful work!
RailMan: Thank you. It is tough puzzle, but the line is much more restricted that it seems at first.
