Chain
prototypeFive countries in a chain, each sharing a border with the next. Two are missing. Fill them — a fill has to touch both its neighbors, and a wrong one tells you which side it fails on. Three chains, each tighter than the last.
Five countries in a chain, each sharing a border with the next. Two are missing. Fill them — a fill has to touch both its neighbors, and a wrong one tells you which side it fails on. Three chains, each tighter than the last.