Dutch Flat Mates (X-Sums)
(Published on 6. March 2024, 11:30 by Flinty)
Normal Sudoku rules apply.
5's live in Dutch Flats
All 5's in the grid must have a '1' directly above it or a '9' directly below it. It may have both, but it doesn't need both.
Examples provided below on an empty grid.
X-Sums
Clues outside the grid are the sum of the first X cells in the corresponding row/column, where X is the digit in the cell nearest to the clue.
To play this puzzle please click here: Play CTC
Previous puzzles in the Dutch Flat Mates series:
- Classic
- Thermometers
- German Whispers
- Region Sum Lines
- Sandwich Sums
- Little Killer
- Kropki
- Zipper Lines
- Renban - By GoodCity
- Nabner - By GoodCity
- Skyscrapers - By GoodCity
- Dutch Whispers
- Killer Cages
- Arrows
- Ten Lines
- 159 and Even - By GoodCity
- Friendly Cells
- Quads
- Silent Killer - By GoodCity
- XV and Equality
Solution code: Digits from Row 4.
Comments
on 8. September 2024, 19:13 by wuc
Very nice deductions. If you get stuck... its 159. Great setting thx.
on 8. March 2024, 12:23 by Flinty
Thank you all for the kind comments :) I did toy with the idea of a Dutch flag above the grid as a rule reminder - haha - the downside was the colours looked 'off' in some browsers.
on 7. March 2024, 17:27 by abihummel
This is exactly the kind of puzzle I like - the constraints work their magic on the logic across the entire solve, right down to the final disambiguation. Lovely!
on 7. March 2024, 06:28 by mthunter26
Really nice puzzle! Just wanted to say that, despite having read @Hajuhn's comment beforehand, I too got stuck midway through the puzzle before remembering the dutch flats condition haha...
on 7. March 2024, 00:29 by Hajuhn
Really great puzzle, got stuck part way through before i remembered it was also dutch flat mates and not just x-sums haha
on 6. March 2024, 13:16 by Fra314
So cool, this Flat Mates series is really good!
on 6. March 2024, 13:09 by Ragna
Very elegant! :-)
