Whew, I liked this post.
@Theov
I agree with tight spacing when corruption starts to eat in,
but around your core you can usually CXXXC (i.e. 3 tiles between cities).
So my suggestion is:
@ marcoo99
I ask you, what is your goal in the game?
Let your goals guide your settling locations.
Do you wish to win by the industrial era? Do you want to focus on cities size 12 and less?
Go with "2-tile spacing" or "3-tile spacing"
Do you want to be super-powerful in the modern era? With cities producing 1 or 2-turn tanks?
Mix the above with a little "4-tile spacing"
@ "spacing 4 tiles between cities discussion"
If we assume any finite space, and we assume
an un-modded game, then theoretically,
spacing your cities with 3 tiles in-between means:
a) 1 tile is used by city center
a) you budget the 8 immediate tiles for city use
b) you budget at least 1 tile from each of the "Fat-Cross" tips.
1 + 8 + (4 x minimum 1) = 13 tiles per city.
Example:
Say you want your cities to grow to size 12
###PIC IS MISSING###
Let's add 3 tile spacing.
Each city, even when reaching size 12, still has plenty of tiles for itself.
###PIC IS MISSING###
These cities are all at size 12, and reduce distance corruption significantly compared to 4 tile spacing.
3 spaces between cities are more than enough to last you into early industrial era.
4 spaces between cities, you increase distance corruption and run out of land faster.
Note:There are still un-used tiles, even with this 3 spacing formation (see pictures)
"3-tile spacing" fits more size 12 cities in a given space than "4-tile spacing"
"3-tile spacing" cities work fine, even at size 14
This is because "3 tile spacing" makes room for 14 citizens per city: proof in the pictures.
"4-tile spacing" needs to exceed the size 14 population threshold, to yield "payback".
For size 1 - 14, both "3-tile spacing" and "4-tile spacing" never run out of tiles.
Many games are won before any of their cities reach size 15...
Only after you hit that size 15 threshold, can your "pay-back for 4-tile spacing" begin.
Where-as if you go with 3-tile spacing, you've probably won the game by now
I look forward to positive and constructive responses
EDIT: Corrected threshold of payback. 4-Tile spacing payback happens at city size >
14