@
Doshin - Tremendous work!

You've played over half the turns in the game for us and we are in a great position now.
Good luck everyone, may you enjoy the game and may we enjoy watching you enjoying it.
Edit:
Ladys and tasks
Elizabeth ("Elizabeth wants to be treated like the queen she is. You need to impress her with unique status symbols, like...")
a) Rename the proudest ship ever to sail the oceans after her and gift it to her (needs at least 50xp to be worthy)
b) not yet revealed
c) not yet revealed
Isabella ("Isabella is all into romantic gestures. My first suggestion to win her heart would be...")
a) Have the most brilliant minds of your time explain to her that your love is pure, true and eternal (bring one artist, scientist and prophet to her capital and gift them to her)
b) not yet revealed
c) not yet revealed
Catherine ("Catherine's heart has to be conquered. You will have to prove your might to her by...")
a) Take control of the worlds most important resources: Control 4 aluminum, 6 uranium and 10 oil resources (control = have inside your borders and connected to your trade network).
b) not yet revealed
c) not yet revealed
Payment options used:
50 gold
75 gold
100 gold
10 oil! I've never controlled that much oil in my life!
One Oil Well takes 7 turns to improve for a worker which is the same as a Fort.
And the
ocean oil requires
Plastics to improve, not just
Combustion.

4 aluminum and 6 uranium can be a pain to acquire also.
Ya, definitely a long game now.
Let's see, peaceful expansion or war expansion...

We've unfogged 166/1133 land tiles. (15%)
We've met 4 out of 9 AI.
If Willem’s civilization gets destroyed you are allowed to ask any other male leader for advice, but it will cost you triple the gold or workers.
Willem has 2 cities compared to our 5 and is only slightly stronger than us.
He is also closer to Shaka (4 cities) than we are.
Shaka started out -3 with Willem.
I think the mapmaker hates Willem and wants him dead!
The lower Willem's population gets, the less

he will be willing to trade with us. (Currently is 50

)
So if we want all the gold gifts back from Willem, we can't just leave him with a 1 pop city.
Which is what will happen if Shaka conquers Willem's capital before we get Alphabet.
If Willem did end up with one city, the spy mission Steal Treasury would become very powerful though.

The amount of gold you can steal from a city is the city pop/empire pop, so 1 city means you can steal 100% of it.
So if you want to steal 300 gold you need 900 espionage to start. The espionage cost can be brought down with modifiers. (open borders, espionage spending, culture, religion, etc.)
15 Forests in the big fat cross.
At least 11 more with a 2nd border pop.
Has a city ever had more chopping potential?
Can perform some
Passive Espionage techniques now that we have vision on Utrecht.
The more precise
Tachywaxon calculation SabotageProduction*((EspionageByAIOntoYou+100)/(3*InvestigateCity)) yields:
102*((102+100)/(3*773) = 8.88 = 9
in Utrecth's current build.
The fast and dirty
Seraiel method of "divide by 10" says Utrecht has 10

in production.
Doshin's easiest+accurate calculation (Sabotage Production / Influence Civics) * 100 is currently unavailable.
We know Amsterdam has 5 pop and Utrecht has 2 pop, so we can calculate
exactly how much 
Willem has right now.
Steal Treasury for Utrecht costs 245

for us right now.
Test Game indicates there is a +20% distance penalty for Utrecht spy missions.
Real Game says based on our espionage spending vs. Willem's, there is a 102% cost for spying missions.
There doesn't seem to be any trade route, culture, or religious modifiers.
We are searching for the base espionage cost, so we perform Ceiling[245/1.02] 241

Then we perform Ceiling[241/1.2] = 201

base.
The amount of gold stolen is espionage base cost/3, so 201/3 = 67

is ready to be stolen in Utrecht.
Since Utrecht is 2/7th of the population of Willem, that means
he should have between 235 to 237
in his bank.
How much of the 236

that Willem will trade with us depends entirely on his maintenance costs, the turns we've known him, how much

we've taken from him in trades, and most especially his total population (7 pop currently)
http://forums.civfanatics.com/showpost.php?p=12452678&postcount=161
The amount of gold an AI will trade us is the lower of:
((AI Total Population * (Turns since you met the AI + 10) * iMaxGoldTradePercent)/100) - total of all gold that AI traded to player previously
or
AIs current gold - (12*deficit * Speed modifier)/100.
So Willem should currently be offering to trade us ((7*(65+10)*(DanF spreadsheet says 10)/100)-0 = Floor[7*75*10/100] = Floor[52.5] = 50

or (Assuming -3

per turn deficit with 2nd city and 100% research)
235 - (12*(3)*100)/100 = Floor[199] = 190

Since 50

is less than 190

,
Willem should currently be willing to trade 50
out of his 235
.
To simplify things, it's easier to think of it like this:
Turn 65: Willem's Total Pop * 7.5 minus how much gold he has traded to us. 7*7.5-0 = 52.5 gold rounded down to nearest ten.
Turn 66: Willem's Total Pop * 7.6 minus how much gold he has traded to us . 7*7.6-0 = 53.2 gold rounded down to nearest ten.
Turn 67: Willem grows to 8 population! 8*7.7-0 = 61.6 gold rounded down to nearest ten.
That's why vassals who lost half their population always have 0 gold to trade with you.
