Logic Masters Deutschland e.V.

Uncertainty

I have prepared a set of 10 puzzles following the common theme of "Uncertainty". I am releasing the puzzles here on a daily basis, but if you are impatient, the full set can be found at this link. Each puzzle is a combination of two variants, but it is unknown in which parts of the grid each variant applies - that is to be determined during solving.

General Rules: Place a digit from 1-9 into each cell of the grid so that every row, column and outlined 3x3 region contains each digit exactly once.

Killer: Digits in marked cages must sum to the total given in the top-left corner. Digits cannot repeat in a cage.

Somewhere: Marked cages must contain each of the digits written in the top-left somewhere in the cage. Digits cannot repeat in a cage.

Combination Rule: In this puzzle, each cage follows either Killer Sudoku rules, or Somewhere Sudoku rules, or both.