Logic Masters Deutschland e.V.

Rules
Normal Sudoku rules apply.
Additions and multiplications are Mod 9 and 9=0 is written down as 9.
Digits in two cells separated by an X sum to 10.
White dots join cells with consecutive digits. 1 and 9 are consecutive.
A cell joined by a black dot is twice the other Mod 9. For example mod9 (2 * 8) = mod9 (16) = 7. 7 can join 8
No negative constraint.


Link to play: F-Puzzles

Other puzzles
This is my second puzzle with this rule set.
Also try the other one:
Mod 9 makes it solvable