Pirates' Whisper
- Whisper lines
- Renban lines
The brief
Normal Sudoku rules apply. The digits 5 represent treasures which are protected by pirates (digits 1 to 4) from commoners (digits 6 to 9). Each treasure is orthogonally adjacent only to pirates and never orthogonally adjacent to a commoner. In other words: Any digit orthogonally adjacent to a 5 has a value of at most 4. Adjacent digits on a green line have a difference of at least 5. The purple line contains a set of consecutive non-repeating digits in any order.