Memorial (Decoration) Day
- Whisper lines
- Entropic lines
- Renban lines
The brief
Normal Sudoku rules apply. Except for the given numbers, cells which are a chess king's move away cannot contain the same number. GERMAN WHISPERS- Numbers on green lines are at least 5 apart from their neighbors on the line. DUTCH WHISPERS- Numbers on red lines are at least 4 apart from their neighbors on the line. RENBAN- Numbers on blue AND purple lines are each a set of non-repeating, consecutive numbers, in any order. ENTROPY- Yellow AND orange lines each have one low (1-3), one medium (4-6) and one high (7-9) number. White lines have no effect on the puzzle. PARTIAL ROTATIONAL SYMMETRY- WITHIN THE YELLOW SHADED AREA (the entire block of 27 cells), numbers 180 degrees apart sum to 10. (Example: R7C2 and R9C8 sum to 10). Also, WITHIN THE PINK SHADED AREA (the set of 24 cells), numbers 180 degrees apart sum to 10.