Logic Masters Deutschland e.V.

Initial Setter Difficulty: 3/5

Normal Sudoku rules apply.
Place the digits 1-9 so that they do not repeat in any row, column, or 3x3 box.

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.

Modular Snake
Draw a one-cell-wide snake of orthogonally connected cells. The snake can't touch itself, not even diagonally.
- Every three cell sequence on the snake contains a digit from each modular group {147}, {258}, and {369}.
- Circles are on the snake.
- Squares are not on the snake.
- A digit in a circle/square counts how many cells of the same type (snake/non-snake) it sees in the row and column, including itself. The other type blocks vision.

Special Thanks / Apologies
Thank you to Sujoyku for last weeks puzzle! - It was lovely!
Apologies to Palpot! This puzzle began life as a collab, but after Palpot tested my break in (which had an error!), I got carried away and placed a few more clues and soon finished setting the puzzle without him!

I am away on holiday for the next few weeks
Marty Sears has very kindly offered to cover next week (7th Aug) with the Dutchest Dutch Flat Mate yet, then Sujoyku is back the week after (14th Aug) with a twist on Quads, finally, my series co-anchor GoodCity is back (21st Aug) so I can concentrate on relaxing, followed too quickly by unpacking and laundry!! - lol

To play this puzzle please click here: Play CTC

Hint to Start

There is an issue with the values in circles if you directly join the snake near the top of column 3.

This Weeks Puzzle

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