Ooh, amateur game designer -- with emphasis on "amateur". Not sure I can manage my way out of a wet paper bag, though.
A few detailed questions based on a 2nd reading:
Usable Space: A measurement of how much space a city has to build with. You can find this in the city detail screen.
If you mean the "Open Tiles" number on the detail screen, they actually mean "square" -- but it's misleading. I currently have a level 3 city with 28 tiles occupied and 27 little green squares visible when I try to build something. But since that adds up to more than 50, you can't really use all
of those "usable" tiles. You can use any
of them: that is, you can build your next 1-square improvement on any of those 27, but in the long term you're only going to use at most 22 of them. Aside: I could write it in predicate logic to be precise but math is often a write-only language.
You can also build improvements outside your influence area as long as all other requirements are fulfilled.
It took me a while to figure out what this meant, since it involved putting all the pieces together. I have no idea how to prevent the initial false mental picture I built up; maybe it's just a comment that some people are slow enough to get confused. You've got to state the detailed rules up above where you did, but maybe a more concise summary is appropriate here? Perhaps add:
That is, if building it keeps you under 50 squares, and if it's far enough away from any other city's tiles, and it's next to another existing improvement, then you can build it even though it's outside the area of influence.
But that's probably too wordy -- certainly so if hardly anyone but me got confused. However: Has anyone checked if this can chain? That is, build one thing outside, then another even further outside?
( Example 2)
Here is another example (and probably more common). In this case, there are multiple resources near by and they are touching.
[A] [ ] [R1] [R2] [ ] [ ] [ ] [B]
A builds and encloses the nearest resource. Then, he builds the second resource and closes that too.
I'm confused about how this happens. To enclose the nearest resource R1, doesn't he have to build (X) the square between them? If so, how can he enclose R2? Isn't it too close to B? (4 tiles away, not 5)? Or am I miscounting?
And, not reacting to anything specific: Does a resource have to be enclosed to get the benefit of the multiplier buildings? If a gold mine is outside the walls, does it lose the +25% from the market? This might actually be answered by deducing something from what others have already said, but it wasn't clear to me.
Someone suggested not founding a city adjacent to a resource, but rather 1 tile away, so they'd be in a separate build queue. But how long does it take for influence to spread far enough to build on such an outside resource? since you can't fulful the "build outside influence" requirements without connecting it via other improvements and thus put it on the city's build queue? I usually want the benefits of the resource soon enough that I settle next to it.