Logic Masters Deutschland e.V.

Sudoku: Normal rules apply. Place the digits 1–9 once each in every row, column, and 3×3 box.

Killer Cages: Digits in a cage sum to the number in its top-left corner.

”OEP Groups”: Within each 3×3 box, cells containing Odd digits form one orthogonally connected group. Likewise, cells containing Even digits and cells containing Prime digits each form their own respective orthogonally connected groups. Groups may overlap.

Fog: Most of the grid is covered in fog. Digits may only be entered in revealed cells. Entering correct digits may clear fog elsewhere in the grid. (Entering digits in fogged cells is neither required nor intended)