Someone has probably already written some JS that plays the game automatically.
The way I'd do it is 1) track the current turn, 2) look up the city's coordinates using a reverse geocoder like OSM's Nominatim[1], and 3) draw a marker at the location using Leaflet.
The way I'd do it is 1) track the current turn, 2) look up the city's coordinates using a reverse geocoder like OSM's Nominatim[1], and 3) draw a marker at the location using Leaflet.
[1]: http://wiki.openstreetmap.org/wiki/Nominatim