Demographics at T18:
I'm not going to overanalyze C&D stuff, but at the moment I'm bored and sick so I decided to distract myself from how terrible I'm feeling by figuring the current state out.
What we know about tech:
Aetryn - Mining, The Wheel, Agriculture, Fishing - 6000 soldiers from tech
Greenline - Mysticism, The Wheel, Agriculture, Mining - 6000 soldiers from tech
Xist - Mining, Fishing, Agriculture - 2000 soldiers from tech
Bing - Hunting, Mysticism, Agriculture, Mining - 4000 soldiers from tech
Score increases:
T0 - everyone but greenline founds
T1 - greenline founds
T6 - I finish Agriculture, Bing and Xist finish a similar cost tech, and given they were working the exact same tiles as me up until last turn, and nobody has gone up soldier points since the start, must be Agriculture
T7 - Greenline finishes a tech. Again, Agriculture
T13 - I finish Fishing, Bing also finishes a similar cost tech, must be Mining, as someone has 4000 from tech and Xist hasn't finished any other techs yet.
T14 - Greenline finishes a tech, must be Mining, as only he can have 6000 soldiers from tech
T17 - Border expansion score increase for everyone not Greenline
T18 - Border expansion score increase for Greenline
After putting one turn into BW, I re-evaluated my tech needs and switched to Hunting in time to have Animal Husbandry by the time my second city is down, therefore my tech completion time for Hunting will be one behind.
A turn or two ago I looked at Demos but didn't take a screenshot, and everyone else was making 19 when I was making 17. This must be: Bing researching a tech w/o prerequisite same as me, but having +2 culture from Creative, and the other two must be researching a tech with prerequisites. Also, at the time, food and hammer yields were all identical, so we must all have been working farmed river wheat + elephants I think.
Current Tech Guesses:
Bing - The Wheel, or maybe Fishing
Xist - BW, AH, Masonry, or Sailing. Of these, I believe he has accumulated too many beakers already for AH/Sailing (and sailing makes no sense anyway), so this is probably BW
Greenline - Could be BW, Pottery, or Masonry, or Meditation/Polytheism. Seems likely to be BW.
Tile yields we are working:
Greenline is probably still working wheat + elephants, since he couldn't really have finished anything else yet, which accounts for the 5 production.
Someone has 10 food, and is thus working a 3 food tile plus their wheat. Or a 6 food tile and elephants, but I I don't think it's possible to have farmed another tile yet, nobody has AH, and nobody else is working coast (would show up in commerce).
Someone also has picked up one extra commerce, otherwise we'd all be tied at 19 (I'm working fish for +2, Bing has KK for +2, and the other two are working techs with prereqs).
Unfortunately I don't have enough of the tile yields memorized to really know what these tiles are likely to be.