Logic Masters Deutschland e.V.

Rules:

• Normal Sudoku rules apply.
• Modular lines (turquoise) : every set of three sequential digits along a line must contain a complete set of residues modulo 3, i.e. one digit from {3,6,9}, one from {1,4,7} and one from {2,5,8}.
• Genetics lines (grey): each "child" cell connected to two "parent" cells in the row above must have the same parity as one parent and the same modularity as the other parent.
• Digits along lines may repeat if allowed by other rules.
• Digits joined by a black dot are in the 1:2 ratio.
• Digits joined by a white dot are consecutive.
• Not all dots are given.

Play online using CTC / SudokuPad or F-Puzzles

Originally published as part of the Modular Lines Competition Pack for Cracking the Cryptic.

In case you get stuck : video solve