DaviddesJ said:
I think that doesn't work. You can only connect a resource to a city by road or by river, not by coast.
Well, I know that's not completely true but I couldn't give you the definitive rule on it.
I intend to research with the sample game when I get home but my daily experience in replaying the last SGOTM proved that you can connect non-roaded cities with Sailing; even land-locked ones by way of a coastal resource that's roaded to the city.
I think the rules are:
The city must be on the coast or roaded to a coastal resource (that is developed). It's possible that naked roading to the coast is sufficient but I doubt it since that doesn't work in connecting to rivers.
The civ must have sailing to use coastal squares as a trade route. The intervening coast must be explored and not possess closed cultural borders (a barbarian state or a non-open-border civ will embargo the route). In SGOTM001, I had open borders with Russia and could trade with Sailing with India/Persia but lost the route when I declared war.
You can use ocean squares in the same manner (more difficult to embargo with culture).
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It *may* be required that you road the developed resource square (regardless of any surrounding roads). I've accidentally connected to a developed iron across a lake before (pretty sure no road there) and I've definitely connected to resources by river with no roads (SGOTM001 Thebes cattle and SGOTM001 Memphis-cattle connects you to Thebes). I've not extensively tested coastal connections, but I wouldn't be surprised if they all work the same way once Sailing opens that trade conduit (SGOTM001 - you can connect Thebes to the isthmus city on the desert square if you develop the cattle [I think] or road to the rice and farm that. You also have to not be cut off culturally).
It *may* be required that the resource connect to a city, but again it might not because that's not true of fresh water routes. I played an Emperor challenge game and many of the top players (not me) were successfully connecting things up without roads or rivers and getting off to far faster starts than I.
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I'll try to provide saves to demonstrate success and non-success if I can work out the details before they give us the 4000BC save.