Logic Masters Deutschland e.V.

Zero star puzzle.

Try solving this one in your mind.

Normal sudoku rules apply. Place the digits 1-4 once each in every row, column, and 2x2 box.

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

Renban: digits along a pink line are a set of consecutive non-repeating digits in any order.

Kropki: digits separated by a white dot are consecutive.

Cells connected by a V sum to 5. Not all Vs are given.

Digits may not repeat along marked diagonals.

Solve in VariantDoku (iOS) or on SudokuPad.