Doubling Sum Lines
(Eingestellt am 20. Januar 2026, 21:35 Uhr von mimec)
This puzzle is a bit similar to the Continuous Sums sudoku which I published last year, but this time the sums have to double along the lines.
Rules:
- Normal sudoku rules apply.
- Box borders divide the blue lines into segments. Digits within each segment must sum to values which increase in 2:1 ratio along the line. Every visit to a region counts to a new total.
For example, 4-125-79 is a valid sequence of digits along a doubling sum line, because the sums of digits in the segments are 4, 8 and 16:
Note: The starting and ending sum and the direction in which the sums increase must be determined by the solver. They can be different for each line.
Lösungscode: Row 5
Kommentare
am 29. Januar 2026, 22:25 Uhr von dawidk
Math puzzle = Good puzzle. Great math puzzle = Fantastic puzzle!
am 28. Januar 2026, 20:02 Uhr von miranda_9
Very nice. Love doing the math and eliminating the possibilities, that don't work. It was not hard but fun.
am 28. Januar 2026, 19:58 Uhr von MiguelMunoz
Good challenging puzzle. The key was figuring out where to make reasonable guesses that I could quickly narrow down. (But I still don't understand the rule that says "Every visit to a region counts to a new total." Huh? Region?)
am 28. Januar 2026, 18:11 Uhr von jez9999
Hate this puzzle. Feels very brute force, not a natural solve at all. Very hard.
am 26. Januar 2026, 21:28 Uhr von dzamie
Pretty fun, very tricky, but still doable (with a LOT of careful notes).
am 26. Januar 2026, 21:25 Uhr von MrWhite2020
The end logic seemed a bit brute force for the 3-1 line in box 7. Or I am missing some logic
am 22. Januar 2026, 23:43 Uhr von VitP
easier than it looks, because the lines are strongly forced
am 22. Januar 2026, 00:25 Uhr von Ragna
Very fun puzzle! Thank you. :-)
am 21. Januar 2026, 09:22 Uhr von Snookerfan
Fun puzzle, thanks!
am 21. Januar 2026, 00:28 Uhr von Qodec
Cool idea, very nice execution!
