I finally have a good candidate game going, playing Spain with capitol as 20k town. No way I'm going to beat sanabas' date, but I'm happy with a win since I've never ever won on Sid before (granted, I've only tried twice before, on pangea). I got Oracle (missed Colossus by one turn but could trade for Myst), GLib and SoZ in the AA, and Sistine, Cope, Newton and Magellan in the MA, and I'm now 8 turns from researching FA. Current projected date is 1888 AD, but I hope to push that down by at least 50 years.
The key to this game was three things:
First, I got the best island all to myself. The Chinese could reach me via coast, but they have yet to send even one unit to my island, probably because they spent all of the AA at war with the Mongols who they could also reach via coast (funny enough, they were the last civ I met).
Second, I met three civs before I needed to trade for BW, and several more shortly after, which meant I could control the trading, holding on to Alphabet and Writing for a long time. I was the first to the MA by a margin, and the first to the IA by even more.
Third, getting the SoZ (I traded for Ivory from China!) meant I could keep a good defense without investing in it. Instead I had two 5-turn settler factories up fairly early and could settle most of my island without contention (and that's the largest island with the best land).
My capitol is in the middle of a grassland, with two cows and a lot of river. I only got 22 spt before Eng, 25 spt from Eng on. I risked losing the race to Magellan (which was going to trigger my GA) so I had to build a Conquistador and declare on the Incas that had built a town on my island. The GA gave me 38 spt (frustrating) and got me both Magellan and Newton, as well as a healthy lead to the IA. I tried my old 20k trick of beelining for Industrialism before going back for FA, hoping someone would give me PP. In hindsight it probably was a mistake, since there were no MA wonders left that the inreased production from railroads, factory and coal plant (66 spt, frustrating!!!). In games on emperor and below you can often have a good enough lead that the high production can give you a lot of late MA wonders. Not here though, but I'm going to build US same turn I get FA and can then build Shakespeare in 7 turns.
It wasn't until I went back here now that I realized I haven't gotten any SGLs at all, despite being the first to Writing, Philo, Lit, Currency, Mono, Theo, Edu, Astro, Nav, Chem, Phys, ToG, Mag, Steam, Ind and PP. I'm so used to playing with SGLs turned off that I hadn't even noticed.
What are the chances of popping an SGL anyway?