Logic Masters Deutschland e.V.

This is the first part of a collection of puzzles I have created using the octoquadri ruleset invented by Analytical Ninja. I set a bunch of these puzzles across several months because I found the ruleset interesting, and once I had enough I collected them into a pack. I'm now uploading the pack here, split into 4 parts roughly according to difficulty, each containing 4 puzzles.
You can download the full pack here.

Here are the links:

Garden Path

Grill

Mortar and Pestle

Island Fortress

Rules: (With the puzzles each variant appears in)

• Octoquadri: (All puzzles)
  Fill the grid with 8 of the digits 1-9, such that each digits appears exactly twice, and no digit repeats in a row, column, or 2x2 box.
• Global Entropy: (Garden Path)
  Every 2x2 square (not necessarily region) must contain 1 low digit (123), 1 medium digit (456) and 1 high digit (789).
• XV: (Mortar and Pestle, Island Fortress)
  Digits seperated by an X sum to 10, digits seperated by a V sum to 5.
• Kropki pairs: (Grill, Mortar and Pestle)
  Digits seperated by a white dot must be consecutive. Digits seperated by a black dot must be in a 1:2 ratio.
• Inequality: (Garden Path)
  The inequality sign points to the smaller digit.
• Whisper: (Island Fortress)
  Adjacent digits on a yellow line differ by at least 3.
• Region Sum Line: (Grill)
  Digits on a blue line sum to the same value in each region it passes through.
• Thermometer: (Garden Path, Mortar and Pestle)
  Digits along a thermo increase from the bulb end.
• Killer: (Garden Path)
  Digits in a cage do not repeat and sum to the total given.
• Quads: (Garden Path)
  Digits in white circle must appear in the 4 surrounding cells.
• Fortress: (Island Fortress)
  A digit on a grey cell must be larger than all orthogonally adjacent cells.
• Entropic Line: (Island Fortress)
  Every set of three digits along a peach line must contain 1 high digit (789), 1 mid digit (456), and 1 low digit (123).

There other parts of this pack can be found here: Part 2 Part 3 Part 4