Pea Shooter
- Kropki dots
- XV and number dots
- Entropy windows
The brief
- Normal sudoku rules apply.
- Global entropy - every 2 by 2 box of cells contains at least one low digit (1, 2, or 3), one medium digit (4, 5, or 6), and one high digit (7, 8 or 9).
- Split Peas - The sum of digits in cells connecting two circles is equal to a concatenation of the digits in the circles, in some order. For instance, 3-346-1 could be a valid line, as 3+4+6=13=1 concatenated with 3.
- XV sums - digits connected by V sum to 5; digits connected by X sum to 10. No negative constraint.
- Ratio Kropki - digits connected by a black Kropki dot have a value ratio of 2:1. No negative constraint.
