Jump Between All World Capitals: Closest Pair Together
Start with the Capital City pair that is closest together. Then, out for the remaining capital cities, find the pair that is closest together. Keep going! Typing any of the two capitals will do. When you guess an answer, at the end of it you are shown the initial letters of the following pair
Distance is shown in brown if the two capitals are each other's closest (even when considering capitals that have been typed in already), in yellow if one of them is but the other isn't
Initials of the first pair: RV
Watch out for the following initials that might not be obvious: C for Colombo; M for Melekeok; P for Porto-Novo, Pretoria; S for Sucre; T for Tarawa
Consider it training for 'Jump between World Capitals: Most Isolated from previously listed ones' which will be submitted in a couple of Mondays or so ;)