Country Neighbour Connect: Least Populous, starting with World's Least Populous
Always choose the least populous neighbour, when left with no neighbors go back to the previous country and follow with second least populous neighbor. Start with the Country with the smallest population in the world, which also happens to be the Country with the smallest surface area!
Overseas borders are considered: UK-Spain, Spain-Morocco, France-Netherlands, France-Brazil/Suriname
Dubious India-Sri Lanka and Qatar-UAE are not considered