Normal sudoku rules apply. German whispers: Adjacent digits on a green line must have a difference of at least 5. Digits in grey circles must be odd and digits in grey squares must be even. In cells separated by a black dot, one digit must be double the other. Not all dots are given. Renban: Digits placed on purple lines must be a non-repeating set of consecutive digits, in any order. Digits separated by an X must sum to 10. Not all Xs are given.