An explanation I borrowed from a play called Samson -
In the City Display, if you click on a unit supported from another city you are given the option to Zoom to its home city in the display. This feature also works during the city processing phase at the beginning of a new turn. If you Zoom into the display of a city which has just built something, you can zoom from there to another city (via a supported unit) which has not yet been processed that turn and alter its production orders.
Why is this useful? To take advantage of newly discovered technology. In a recent game, I completed research on Automobile by delivering a couple of freights, ensuring this tech would be acquired after my first city contributed its science. I sent a supported unit from my SSC into my second most recently established city and rushbuilt something there. On the next turn, I zoomed into the second city, followed the link to my SSC, changed its production orders to Superhighways, then rushed it. This allowed me to build the SH in my SSC on the same turn I discovered Automobile. The extra science in the SSC from highways gave me a second tech that same turn. I did this again with Computers and Research Lab.
By using defense units supported by other cities, it's possible to set up a chain of links running through all cities and upgrade production orders in any city. I'd be interested in knowing if others have used this technique and for what purpose.
Here endeth Samson's lesson.
Okay I am sure some of you are well aware of this exploit. But there are so many more things you can do with this I'll put a few down
Benefit 1
You can build a wonder on the same turn you discover the require tech to Build it
Benefit 2
You can do the same with units and city improvements
Benefit 3
You can scrape up the few extra gold in the city processing cycle to afford a rush build.
Benefit 4
You can sell off an improvement you don't need anymore.
Benefit 5
You can share resources between a maximum of 4 cities! such as whales or maybe even better a mined grape hill ( this changes the game the most ) when calculating the worthiness of land improvement such as mining or irrigating ESPECIALLY when employing the next trick on my list will force players to reconsider long entrenched tactics.
Lets say you have city A,B,C and D warrior from A goes into City B city B warrior goes in city C, City C warrior goes in city D now everything is set. ah not yet, City D has to do something so that you can "go to city" in the city process cycle(CPC) now you are all set ( this can be difficult to do every turn I'll come back to that later there are many tricks there too! ) now lets say city D comes up in the CPC you built a temple so of course you go to city
First rearrange workers take them off any resource you want City C to work on, If you share a trade route with city A,B or C put on ocean squares for good trade as your trade city may benefit whichever city you are trading with.
Second rehome any charging settlers *see Benefit 6 you can alsosell off any city D improvement you feel you no longer need at this stage too.
Third find City C warrior and zoom to home city. You will find yourself in the City C window
Fourth rearrange your field workers and rush buy an improvement, unit or wonder now available from the tech you newly acquired from lets say City E or D
Last close the window you will find yourself straight back in Window C so repeat for City B
Benefit 6
As stated just above You can charge a settler from city A in city B when the processing gets to city B re-home it there and wake it up your settler has escaped it's two shield one food penalty ( okay this is not strictly a ZTHC trick but you do this while rearranging your workers in the city status map.) It can be a nice idea to have a trireme to take the settler back to city A after the CPC re-home trireme and settler send the settler back to city B and charge it there again. next time the settler will walk back up the road and the Trireme can ferry it back next CPC you can re-home the trireme avoiding the shield upkeep. I have done this extensively through games micromanagement at its most anal. The trireme isn't there for just that though I like a trireme around with a Diplomat on the ready to turn the Barbs against each other and capture lone barb leaders that may foolishly leave their flock. but I will leave the ins and outs of that little tactic for another day.
Okay now some ideas to get into city windows to start the chain going.
Building an improvement, wonder, settler, Dip/spy
Revolt and back from revolt - dont mind it in some cities one revolt for the price of two windows if you are hard up.
Food is running low - one of my favs, won't cost gold and you can do things to make it more palatable caravans mined gold or copper will help
WLTPD opening and closing is another good one
The upgrading unit message helps on occasion as long as you don't forget to take advantage of which I often do.
City D is still building... - another fav also lots of things you can do to make this work.
Benefit seven (or five if you like)
Your WLTPD will have so much more milage when sharing city resources and allow you into city windows too!
One more benefit is your cities no longer need spacing out there is no overlap tiles restricting growth! and that is massive. Roads connecting cities spaced every two squares speeds up movement and saves turns, Settlers can go along a chain A to B to C to D without suffering shield and food penalty. Cities are happier and more defendable. Rehoming units to get that one more shield is that much easier, Triremes can move from one city to another in one turn. railroads become almost instant. Helper Cities can help one or two moves quicker. Less need for station cities. Less chance of getting hemmed in by another civ or trapped on an island. Its just all win.
Well that's all for now hope you enjoyed.
In the City Display, if you click on a unit supported from another city you are given the option to Zoom to its home city in the display. This feature also works during the city processing phase at the beginning of a new turn. If you Zoom into the display of a city which has just built something, you can zoom from there to another city (via a supported unit) which has not yet been processed that turn and alter its production orders.
Why is this useful? To take advantage of newly discovered technology. In a recent game, I completed research on Automobile by delivering a couple of freights, ensuring this tech would be acquired after my first city contributed its science. I sent a supported unit from my SSC into my second most recently established city and rushbuilt something there. On the next turn, I zoomed into the second city, followed the link to my SSC, changed its production orders to Superhighways, then rushed it. This allowed me to build the SH in my SSC on the same turn I discovered Automobile. The extra science in the SSC from highways gave me a second tech that same turn. I did this again with Computers and Research Lab.
By using defense units supported by other cities, it's possible to set up a chain of links running through all cities and upgrade production orders in any city. I'd be interested in knowing if others have used this technique and for what purpose.
Here endeth Samson's lesson.
Okay I am sure some of you are well aware of this exploit. But there are so many more things you can do with this I'll put a few down
Benefit 1
You can build a wonder on the same turn you discover the require tech to Build it
Benefit 2
You can do the same with units and city improvements
Benefit 3
You can scrape up the few extra gold in the city processing cycle to afford a rush build.
Benefit 4
You can sell off an improvement you don't need anymore.
Benefit 5
You can share resources between a maximum of 4 cities! such as whales or maybe even better a mined grape hill ( this changes the game the most ) when calculating the worthiness of land improvement such as mining or irrigating ESPECIALLY when employing the next trick on my list will force players to reconsider long entrenched tactics.
Lets say you have city A,B,C and D warrior from A goes into City B city B warrior goes in city C, City C warrior goes in city D now everything is set. ah not yet, City D has to do something so that you can "go to city" in the city process cycle(CPC) now you are all set ( this can be difficult to do every turn I'll come back to that later there are many tricks there too! ) now lets say city D comes up in the CPC you built a temple so of course you go to city
First rearrange workers take them off any resource you want City C to work on, If you share a trade route with city A,B or C put on ocean squares for good trade as your trade city may benefit whichever city you are trading with.
Second rehome any charging settlers *see Benefit 6 you can alsosell off any city D improvement you feel you no longer need at this stage too.
Third find City C warrior and zoom to home city. You will find yourself in the City C window
Fourth rearrange your field workers and rush buy an improvement, unit or wonder now available from the tech you newly acquired from lets say City E or D
Last close the window you will find yourself straight back in Window C so repeat for City B
Benefit 6
As stated just above You can charge a settler from city A in city B when the processing gets to city B re-home it there and wake it up your settler has escaped it's two shield one food penalty ( okay this is not strictly a ZTHC trick but you do this while rearranging your workers in the city status map.) It can be a nice idea to have a trireme to take the settler back to city A after the CPC re-home trireme and settler send the settler back to city B and charge it there again. next time the settler will walk back up the road and the Trireme can ferry it back next CPC you can re-home the trireme avoiding the shield upkeep. I have done this extensively through games micromanagement at its most anal. The trireme isn't there for just that though I like a trireme around with a Diplomat on the ready to turn the Barbs against each other and capture lone barb leaders that may foolishly leave their flock. but I will leave the ins and outs of that little tactic for another day.
Okay now some ideas to get into city windows to start the chain going.
Building an improvement, wonder, settler, Dip/spy
Revolt and back from revolt - dont mind it in some cities one revolt for the price of two windows if you are hard up.
Food is running low - one of my favs, won't cost gold and you can do things to make it more palatable caravans mined gold or copper will help
WLTPD opening and closing is another good one
The upgrading unit message helps on occasion as long as you don't forget to take advantage of which I often do.
City D is still building... - another fav also lots of things you can do to make this work.
Benefit seven (or five if you like)
Your WLTPD will have so much more milage when sharing city resources and allow you into city windows too!
One more benefit is your cities no longer need spacing out there is no overlap tiles restricting growth! and that is massive. Roads connecting cities spaced every two squares speeds up movement and saves turns, Settlers can go along a chain A to B to C to D without suffering shield and food penalty. Cities are happier and more defendable. Rehoming units to get that one more shield is that much easier, Triremes can move from one city to another in one turn. railroads become almost instant. Helper Cities can help one or two moves quicker. Less need for station cities. Less chance of getting hemmed in by another civ or trapped on an island. Its just all win.
Well that's all for now hope you enjoyed.