Logic Masters Deutschland e.V.

My second attempt to make interesting combination of colouring and doublers.

Rules

Sudoku: Fill every row, column and 3x3 box with the digits 1-9.

Anti-Knight: Digits a chess knight's move apart cannot contain the same digit.

Killer: Digits in a cage cannot repeat and must sum to the total in the top left corner if given.

Doublers: One cell in every row, column, and box is a doubler cell, which doubles its value in cage totals. Doublers cannot appear a chess knight's move apart from each other. Every digit 1-9 is doubled exactly once.

Play this puzzle on CtC