Logic Masters Deutschland e.V.

If you haven't had the pleasure of experiencing Flinty's wonderful Dutch Flat Mates series I highly encourage you to do so — you'll find the entire series linked below.

Special Thanks to Flinty for helping me edit and improve this puzzle.
By the way, yesterday was Flinty's birthday — Happy birthday!

Rules:

Normal Sudoku rules apply. Place the digits 1-9 once in each row, column, and 3X3 box.

5s live in Dutch Flats All 5s 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.

Search 9: A digit in an arrow shows the distance to a cell containing a 9 in the indicated direction (not necessarily the 9 closest to it).

Solve online: 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
• X-Sums
• Numbered Rooms - By GoodCity
• Diagonal X-Sums
• Yin Yang (Neighborhoods) - By Palpot
• Hit Points
• XY Difference - By GoodCity
• Double Sandwich Sums
• Foggy Knights
• Look And Say Little Killer
• Slingshot - By GoodCity
• 258 Row Index + Odds
• Rellik Cages