Sorry guys my english is bad it´s not you,it´s me XD The point is that the number of workable tiles stays THE SAME. You can shape your cities to have L shape,or U,or P or whatever. Example. You have cities that overlap on one side and you simply acquire tiles in the other way to make up for the ones that would overlap there one by one and they are still workable despite that they are 4,5,6 or 7 tiles away. Only 36 tiles are workable so you need to choose clever which to acquire and how to form your city because it depends how many units will you need to defend it. Example. I got Iron 6 tiles away on the north i need to buy tile by tile so that one tile borders that resource to buy it,like with the general and citadel in civ 5. Then i see south ivory 5 tiles away then i did the same there.Where east and west i can only go 1 tile away from my capital since i expanded much workable tiles to acwquire those resources that where much further away. So I am expanding my 36 workable tiles the way i want for which tiles i want. The city only starts with the usual oval shape with 6 tilesi Hope you get it now xd