Double Equals
(Published on 13. August 2022, 23:59 by josh_johnson)
Rules:
- Normal sudoku rules apply.
- Region Sum Lines: for each line, digits on the line have an equal sum N within each box it passes through.
- Doublers: One cell in every row, column, and box contains a doubler cell. For purposes of region sum lines, a digit in a doubler cell counts for twice its value. Every digit from 1 to 9 is doubled exactly once.
Solution code: Row 8
Comments
on 4. September 2022, 17:32 by StephenR
Splendid puzzle, thanks, and not as horribly difficult as I thought it might be. That said, I did caught out by doubler arithmetic in box 8 and had to backtrack a little.
on 19. August 2022, 02:33 by josh_johnson
Based on feedback, an extra clue has been added to smooth the solve path.
on 16. August 2022, 08:57 by cdwg2000
【区域总和线+双倍数数独-哔哩哔哩】 https://b23.tv/3UIOohW
on 14. August 2022, 17:24 by deltameth
Wow, wonderful puzzle! But so easy to make a mistake even being super-accurate.
It took me ages to realize that two region sums in box 7 reaching >45 does not make the box broken. It just because one of the digits is doubled.
on 14. August 2022, 06:15 by Kworb
Quite tricky, easy to make a wrong deduction and break the puzzle (as I did several times). But the logic is solid and very satisfying to figure out.
