Logic Masters Deutschland e.V.

Normal sudoku rules apply. Place the digits 1-6 once each in every row, column, and 2x3 box.

Killer: digits inside a caged region must not repeat and sum to the total shown in the corner.

Quadruples: each digit shown by a quadruple clue appears at least once in its four surrounding cells.

Even/odd: cells marked with squares contain even digits, and cells marked with circles contain odd digits.

Kropki: digits separated by a black dot are in a 1:2 ratio (i.e. one digit is double the other). Not all dots are necessarily given.

Cells connected by an X sum to 10. Cells connected by a V sum to 5. Not all Xs and Vs are given.

Digits may not repeat along marked diagonals.

Solve in VariantDoku (iOS, macOS, Android) or on SudokuPad.