Logic Masters Deutschland e.V.

This was made for a speed setting competition over on the CTC Fan Discord, which called for a 3D puzzle. A big thank you to IkeManga, Fryguy, yttrio, and NicoD for hosting and judging all the wonderful puzzles! Also thanks to Chinstrap for advice to refine the presentation.

I thought the 3D region building was fun, so I was happy to later find another great puzzle on the portal with the same cube rules. Do give it a try!

4x4x4 Chaos:

• The grid is a 4x4x4 cube. The layers are stacked as shown by the dashed lines (without rotation). Fill every cell with a digit from 1-8 so digits don't repeat in the x, y, or z axis.
• Divide the grid into eight orthogonally connected regions, each containing the digits 1-8 without repeats.

• The digit in a circle counts the number of cells of its own region that it 'sees' in all three directions, including itself, where other regions and the edge of the cube blocks vision.
• A number clue indicates the sum of such seen cells, if given.

• Note: Conflict checker works and can help with scanning between layers.