All World Capitals together with one of 5 Closest Capitals
Type a capital city followed by one of the 5 that are closest to it to make it appear. If this is reciprocal, both will appear.
The following 'non-obvious' capitals are used: Colombo, Delhi, Johannesburg, La Paz, Melekeok, Porto-Novo, Tarawa (partly because urban agglomerations are considered)
Thick borders indicate that capital city has no 'reciprocal' capital; thickest borders indicate capital cities that cannot help reveal another capital