150 AD (0): City check

and the foreign advisor shows smiling faces. Embassy in Istanbul (which is cheap anyway) for 61 gold shows Bach's due in 30 turns there, at 12spt, size 9 and due to grow in another turn. However, Osman doesn't have his nearby hills and mountains mined

which means that we should beat him. Without that, it'd still be close. Embassy in Berlin shows a market almost completed, maxed out at size 12 with 17spt. Bismarck is also

as he has unmined hills and mountains, wasting the food he won't use until Sanitation. That leaves us with exactly 9 gold, so further embassies will have to wait until future turns.
Well, well, well... Osman and Bismarck lack Navigation but have Music Theory. We have nothing to trade for Navigation right now, but if we acquire it before those two do, we might be able to pick it up. Otherwise, there isn't much to see.
(IT): Japan and Babylon start Magellan's.
170 AD (1): Embassy in Babylon reveals size 12, 9spt, Bach's in 38 turns. Even if Hammurabi lays off the

and mines his desert tiles, this city really isn't a good wonder-builder as it has no hills or mountains within its radius whatsoever. Embassy in Paris reveals... Bach's due in 18 turns, size 12, at 17spt! Expect a massive cascade later. Paris has some unimproved plains tiles that probably should be mined, and one

mountain, but is otherwise not shield-heavy. It looks like France was building something else and swapped the build.
Buffalo gets an entertainer until its temple is finished, and I note that France, Japan, and Babylon have Banking.
190 AD (2): Embassy in Salamanca reveals two

hills, 14spt, and size 12.
210 AD (3): I trade Iron + 3g to France for Banking and her WM, which will tell us how well-developed the non-capital cities are. Banking gets Navigation, WM, and 16g from the Iroquois. Banking to Germany gets Wines, Music Theory, WM, and 8g. Banking to Osman gets Furs, 31g, and WM. I know that I traded Banking to Osman at bottom barrel prices, but trading him Navigation for that would have meant an instant Banking-for-Navigation trade from Germany, and I couldn't make the deal with Germany with Navigation.
Oh.. I check and Economics would take 11 turns without a deficit, which probably means that the AI is researching it. I leave research off for now, but if we end up with 12 turns left on the palace build in Philadelphia and no Economics from the AI, we can get it ourselves.
230 AD (4): Bismarck and Osman both still lack Navigation. Otherwise, the world (including us) is at tech parity.
250 AD (5): Everyone but Hiawatha has Printing Press, but Osman doesn't have Navigation. I trade Osman Navigation for PP + his WM.
260 AD (6):
270 AD (7) (IT): The Iroquois, French, and Germans start Magellan's.
280 AD (8): St. Louis Courthouse->Market. The Ottomans start Magellan's. Houston gets a temporary entertainer until its temple is built.
Wow! France, Babylon, and the Ottomans all have Physics and Metallurgy. Look out for Sipahi.
290 AD (9) (IT): Babylon wants to sell me Physics for 1560g, but I decline as it's IBT. Interesting to know that it is affordable now.
300 AD (10): Miami Courthouse->Market. I check and no one new has Physics or Metallurgy, and I don't think it's urgent that we get either, so I leave them. We have a large war chest to buy Econ if it shows up within the next three turns, but if it doesn't, we can currently research it in 10 turns without a deficit, and I believe we should in this case as the AI appears to be going for Democracy, ToG, and MT first. France should build Bach's within the next leader's turn, killing the cascade and probably taking Magellan's with it shortly afterwards. Unless someone has a spare leader floating around, we should be able to grab Smith's in time.
Wild speculation time: During most of this game, we've been playing the peaceful 'please don't hurt me' brokers, and the AI seems to have a uniformly good opinion of us for it. If we can grab ToE in the Industrial Ages, I think we should be able to pull off a Space or Diplo win fairly easily. With this in mind, I didn't spend any of our 2417g treasury (at the end of my turn), in hopes of being able to buy Democracy when it shows up after we get Smith's. (After, and only after, Smith's as we might lose it if we go into anarchy first.) If we decide to do some

instead, we need Physics and MTrad ASAP, as well as a building priority swap to barracks & horsemen/knights to upgrade. I think it would be much easier and less time-consuming to go the builder's route, but the option is open to do either.
300 AD