Dutch Flat Mates (Sandwich Sums)
(Published on 15. November 2023, 11:30 by Flinty)
Normal Sudoku rules apply.
5's live in Dutch Flats
All 5's in the grid must strictly have EITHER; a '1' directly above it AND/OR a '9' directly below it. It may have both, but it doesn't need both.
Examples provided below on an empty grid.
Sandwich Sums
Numbers on the outside give the sum of the digits between 1 and 9 in that column or row.
This will be a weekly series for as long as my brain allows:
Dutch Flat Mates 1: Classic
Dutch Flat Mates 2: Thermometers
Dutch Flat Mates 3: German Whispers
Dutch Flat Mates 4: Region Sum Lines
Dutch Flat Mates 5: Sandwich Sums
Dutch Flat Mates 6: Little Killer (22 Nov)
Solution code: All the digits from Row 5.
Comments
on 3. May 2024, 10:23 by wuc
The easiest of the series for me so far. Nice interaction. The flat mate interaction is very approachable this time. Great setting thx.
on 20. March 2024, 13:24 by ChinStrap
Another great Dutch flat mate combo.
on 15. March 2024, 16:14 by KingIsulgard
Awesome coloring ruleset
on 16. January 2024, 20:12 by Peteronium
Lovely sandwich / Dutch flats combi. Thanks.
on 16. December 2023, 12:53 by Crusader175
Fun and smooth!
on 22. November 2023, 22:01 by lemonice
That was so much fun! Thank you for a great puzzle.
on 16. November 2023, 22:21 by anyeyeball
Very nice. I got the Dutch Flatmates fairly quickly. It was the sandwich stuff with which I struggled a bit. Very enjoyable puzzle. Thanks!
on 16. November 2023, 04:07 by Hajuhn
Completely forgot this was a dutch flat mate puzzle till I had to disambiguate the last part. Great puzzle nonetheless
on 15. November 2023, 16:47 by ViKingPrime
It never ceases to amaze me how much mileage you can get out of this constraint, always with pleasant little surprises in each puzzle. Great work as always!
