Swing Shift
- Kropki dots
- XV and number dots
- Entropic lines
- Entropy windows
The brief
- Normal sudoku rules apply.
- Global modularity - every 2 by 2 box of cells must contain at least one digit from each of the following sets: (1,4,7), (2,5,8) and (3,6,9).
- Entropy - any set of three consecutive digits on a peach entropy line must have a low digit (1, 2, 3), middle digit (4, 5, 6) and high digit (7,8,9).
- XV sums - digits separated by a V sum to 5, digits separated by X sum to 10. No negative constraint.
- Ratio Kropki Dots - digits separated by a black Kropki dot have a value ratio of 2:1. No negative constraint.
