Dutch Flat Mates: Index Lines
(Published on 11. September 2024, 12:05 by marty_sears)
My 3rd contribution to Flinty's excellent and long-running series, Dutch Flat Mates. Here I wanted to combine DFM rules with a fun line type that I've been experimenting with recently.
Rules:
- Normal sudoku rules apply.
- 5's live in Dutch Flats: Every 5 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.
- Index Lines: On an index line, the digit in the Nth cell along the line (starting from the diamond) indicates the position along the line where the digit N appears. Eg: 3214 would be a valid line - the 1st digit, 3, indicates that the 3rd digit is a 1, and so on.
Please leave a comment if you enjoy :)
Previous puzzles in the Dutch Flat Mates series:
- #01 - 18 Oct 23 - Classic
- #02 - 25 Oct 23 - Thermometers
- #03 - 01 Nov 23 - German Whispers
- #04 - 08 Nov 23 - Region Sum Lines
- #05 - 15 Nov 23 - Sandwich Sums
- #06 - 22 Nov 23 - Little Killer
- #07 - 29 Nov 23 - Kropki
- #08 - 05 Dec 23 - Zipper Lines
- #09 - 12 Dec 23 - Renban - By GoodCity
- #10 - 19 Dec 23 - Nabner - By GoodCity
- #11 - 26 Dec 23 - Skyscrapers - By GoodCity
- #12 - 03 Jan 24 - Dutch Whispers
- #13 - 10 Jan 24 - Killer Cages
- #14 - 17 Jan 24 - Arrows
- #15 - 24 Jan 24 - Ten Lines
- #16 - 31 Jan 24 - 159 Index and Even - By GoodCity
- #17 - 07 Feb 24 - Friendly Cells
- #18 - 14 Feb 24 - Quads
- #19 - 21 Feb 24 - Silent Killer - By GoodCity
- #20 - 28 Feb 24 - XV and Equality
- #21 - 06 Mar 24 - X-Sums
- #22 - 13 Mar 24 - Numbered Rooms - By GoodCity
- #23 - 20 Mar 24 - Diagonal X-Sums
- #24 - 27 Mar 24 - Yin Yang (Neighborhoods) - By Palpot
- #25 - 03 Apr 24 - Hit Points
- #26 - 10 Apr 24 - Counting Circles
- #27 - 17 Apr 24 - XY Difference - By GoodCity
- #28 - 24 Apr 24 - Double Sandwich Sums
- #29 - 01 May 24 - Foggy Knights
- #30 - 08 May 24 - Look and Say Little Killer
- #31 - 15 May 24 - Slingshot - By GoodCity
- #32 - 22 May 24 - 258 Index and Odd
- #33 - 29 May 24 - Rellik
- #34 - 05 Jun 24 - Search 9 - By Palpot
- #35 - 12 Jun 24 - Diagonal Outside
- #36 - 19 Jun 24 - Entropic Snake - Collab with Palpot
- #37 - 26 Jun 24 - Rossini - By GoodCity
- #38 - 03 Jul 24 - Pointer Arrows
- #39 - 10 Jul 24 - Same Difference - by Marty Sears
- #40 - 17 Jul 24 - Battenburg and Average Arrows
- #41 - 24 Jul 24 - Omnipotent Lines - by Sujoyku
- #42 - 31 Jul 24 - Modular Snake
- #43 - 7 Aug 24 - Hot and Cold Lines - by Marty Sears
- #44 - 14 Aug 24 - Minmax Quads - by Sujoyku
- #45 - 21 Aug 24 - Quad Sums - By GoodCity
- #46 - 28 Aug 24 - Entropic Whispers - by gdc
- #47 - 4 Sep 24 - Thripper Lines
- #48 - 11 Sep 24 - Index Lines - by Marty Sears
Solution code: Column 3 from top to bottom
Comments
on 19. September 2024, 06:36 by lapazhu
What an excellent puzzle! I’m a sucker for puzzle that doesn’t just fall apart into regular sudoku at the end.
on 14. September 2024, 17:18 by Flinty
Thank you :) Lovely entry in the series.
on 13. September 2024, 17:39 by Nostor
Thank you for yet another very enjoyable puzzle! I haven't done a lot of the Dutch flat mates, so I found it a bit more challenging, but smooth all the way.
on 12. September 2024, 17:42 by Rockon101000
I agree that this one took a long time to conceptualize. I didn't really feel confident for the first two thirds of my solve.
As much as I love Dutch flat mates, one of my biggest concerns has been how quickly that constraint is often resolved, leaving only the rotating constraint. In this puzzle, I greatly appreciated how late into the solve I was still considering the DFM constraint. Very nice!
on 11. September 2024, 17:17 by ViKingPrime
Takes a bit to wrap your head around the ruleset but once you do, you discover quite an elegant setting.
on 11. September 2024, 15:06 by Franjo
Supersmooth puzzle! Clever setting - as always. Thank you so much for creating and sharing.
