Logic Masters Deutschland e.V.

Rule set:

Normal sudoku rules apply. Digits joined by a black dot are in the 1:2 ratio. Not all dots are given. Digits joined by an X sum to 10. All Xs are given (negative constraint).

Modular lines: every set of three sequential digits along a line must contain a complete set of residues modulo 3, i.e. one digit from {1,4,7}, one from {2,5,8}, and one from {3,6,9}. Digits may repeat on a line if allowed by other rules.

Play online using CTC App or F-Puzzles