Logic Masters Deutschland e.V.

RULES:

• Normal Sudoku rules apply.
• All cells in the grid are either part of a Galaxy or a Killer cage, never both. Cells containing a corner clue must belong to a killer cage.
• Killer Cages: A killer cage is a group of orthogonally connected cells with no repeating digits. Killer cages containing a corner clue must sum to that number. Not all killer cages have a given sum clue.
• Cage sizes must be unique, e.g no two killer cages can contain the same number of cells. And different killer cages must not share an orthogonal edge.
• Galaxies: Divide the grid into non-overlapping groups of orthogonally connected cells. Each group contains a red diamond and is 180° rotationally symmetric around the diamond.
• Rotational Differences: Within a Galaxy, cells rotated 180° from each other must differ in value by the digit in their red diamond.

LINKS:

Play on SudokuPad

Here is a couple of example images for how rotational difference can work within a galaxy:

Want to try a warm up puzzle first? I have a 6x6 version with the same ruleset, ready to play here.

Hope you enjoy.