Logic Masters Deutschland e.V.

- Normal sudoku rules apply.
- Anti-Knight: Cells separated by a knight's move (in chess) cannot contain the same digit.
- Kropki: Cells connected by a white circle contain consecutive digits.
- Odd/even: Cells marked by a grey circle contain odd digits, cells marked by a grey square contain even digits.
- Killer Cages (modified): Digits in a cage may not repeat and sum to the cage total, which must be deduced. The digits of the cage total also indicate how many odd and even digits there are in the cage (in no particular order). (E.g. should a cage total be deduced to be 13, the cage includes either one odd and three even digits, or one even and three odd digits, the sum of which must be 13.)

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