Logic Masters Deutschland e.V.

This is my first puzzle. I tried combining as many line rules as I could while maintaining the symmetry until... it had to be broken! Hope you enjoy it!

Solve on SudokuPad

Puzzle:

1. Normal sudoku rules apply.

2. Arrows: Numbers along an arrow must sum to the number shown in the circled cell, and may (or not) be repeated along the arrow.

3. GREEN - German whispers: Adjacent numbers on this line must have a difference of 5 or greater.

4. ORANGE - Dutch whispers: Adjacent numbers on this line must have a difference of 4 or greater.

5. LIGHT ORANGE - Entropic lines: Any set of three sequential cells along this line must contain a low (1-3), middle (4-6), and a high digit (7-9).

6. TEAL - Modular line: Any set of three sequential cells along this line must contain a digit from each of the 3-modular sets (1,4,7), (2,5,8), and (3,6,9).

7. DARK-YELLOW - Nabner: Digits on this line cannot repeat, and if a digit appears, then the digits consecutive with it must not appear.

8. MAGENTA (thick) - Renban: The set of numbers on this line must be consecutive. However, they may appear in any order, and cannot be repeated.

9. GREY - Palindrome: If a number appears as the Xth cell from one end of a palindrome, it must appear as the Xth cell from the other end.

10. BLUE - Twin region sum lines: Digits have an equal sum within each box the line passes through. Both lines that appear in box 3,6 and box 4,7 have the same sum value.

11. PURPLE (thin) - Maximal Symmetric Zipper: Digits equidistant from the line's center must sum to the same value. If symmetrically extended with respect to its center on both ends (boxes 4 and 6), it breaks the zipper condition; e.g, growing the zipper line to cells r4c2 and r6c8 (its symmetric) breaks the zipper condition (r4c2+r6c8 is different than the zipper line sum value).