<br />But How?<br /> <hr></blockquote>
Ah ha! So that was what you meant (you originally asked "what", not "how" <img src="icon12.gif" border="0"> ).
Duke has it right. Civ II will force a city to grow on the next turn if the food box is competely filled. The way it gets fills, and food deficits are irrelevant... the city is gunna grow. Normally, you add food with the natural surplus. By ramming food caravans (& freight) into a city, the box will fill. On the next turn, the city will grow by one.
But this is not the "trick" part of the FCT. This is merely using a food caravan. The trick (cheat) comes when you keep using food caravans from the same source city to the same destination city. Due to a bug (oversight) by the game's programmers, the source city will only be charged one food per turn from it's surplus, which means (in effect) a city can force a neighbor to grow unnaturally, and with no corresponding game balance. In effect, you are simply using shields to cause growth, and the intended penalty on the source city (one unit of food per caravan delivered) is short-circuited.
More than any other single game bug, this is the one I personally object to the most in comparison games like the GOTMs or Successions, since it can rapidly unbalance a game, raise the bar, and force eveyone into a truly mind-numbing exercise to tediously build unnatural cites that should not exist in the first place. And remember, the only possible motivation for
anyone to build a city larger than 37 is to add one point per citizen to your score. Citizen #37 and beyond can contribute nothing positive to an empire.
On the other hand, if someone wants to go for an absolute "max" record, by all means... let those caravans rip and have at it! I'd probably recommend a person talk to Shadowdale first (seriously!), to find out the time involved... it would be quite tedious to go for 30,000+ score <img src="smile.gif" border="0"> . I'm here to tell you that even a 15,000+ score with no FCT takes over a month of regular play <img src="icon12.gif" border="0"> .
In summary, food caravans (even when delivering them to a city) and the FCT are
not the same thing, and not synonymous. One can use food caravans to deliver food to cities in a game... it only becomes the FCT when you begin forcing growth in the destination city without the corresponding food route penalty in the source city.
Hope that helps, because the FCT is probably a confusing issue for many!