Published
After not creating any puzzles for over a year, the concept for this rule came to me while solving another puzzle. It’s turned out to be a nice and simple ruleset with some quite interesting consequences.
Sudoku: Fill the grid with the digits 1-9, so that each digit occurs exactly once in every row, every column and every 3x3 box.
Clone Cages: All cages with the same sum are clones (they contain exactly the same digits in the same relative positions). All cages have at least one clone.
Kropki: Digits connected by a white dot are consecutive. If digits are connected by a black dot, one is double the other.
Commonality
When killers overlap
Little Fillers
When fillers are killers
Little Fillers 2
Now without digits!
Cityscrapers
X-sums in the City
The Clone Gunmen
Where killers repeat themselves