200 Looking Back
- Kropki dots
- Whisper lines
The brief
- Normal sudoku rules apply, i.e. each row, column, and 3x3 box has to contain the digits from 1 to 9 once each.
- German Whispers: Adjacent digits on a green line must have a difference of at least 5.
- 200 Lines: Each blue line (top right and bottom line) is split by box borders into segments such that the product of its segment sums equals exactly 200. For example, a valid line could read 26-7891 since (2+6)x(7+8+9+1)=8x25=200.
- Kropki: Digits joined by a black dot have a 1:2 ratio. (Not all dots are given.)