So, here's why I think my position is nearing the unreachable point:
I'm at 12 cities, 13 next turn. Bacchus and Rowain have 9 each.
1. Science:
Ichabod: 127.6 science per turn (31 techs) - I have 3 industrial techs near finishing, as I'm waiting for Eurekas and builds. My lead is more sizeable than it seems, by number of techs, I think.
Rowain: 91 spt (30)
Bacchus: 66.3 spt (26)
I don't understand how Bacchus research is so low. He has Jesuit Education, coupled with the faith from harvest pantheon. He should have some more libraries and universities and, since his culture is actually pretty high, he should already have reached the double science from these buildings. Perhaps he spent too much faith trying for a sneaky religous win... Perhaps he didn't build much campuses? I don't know, but it seems too low.
2. Culture:
Ichabod: 115.9
Bacchus: 99.6
Rowain: 53
Bacchus has claimed the only Artist GP so far, a Great Writer. He also has the Colosseum, that explains high culture. My culture is from the +1 culture per district, which is a crazy good policy, and from Choral Music (which is a broken belief, I think; way too good to be in the game). A dedicated Russia/Japan push for Choral Music is likely a killer strategy.
Rowain is way behind, so he's probably lacking the policies he needs to build new units, new ships and enhance his yields per turn.
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Looking at this numbers, it makes me think that Bacchus is running some strange policies to try and do something crazy... He should be able to generate more science than that.
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3. Military Score:
Ichabod: 897 - that's without the mass upgrades I'm planning for the next few turns. And I'll probably start building more military soon, due to the lack of better stuff to do with my hammers.
Bacchus: 850 - I think Bacchus best units are knights and muskets, nothing that I'm afraid of.
Rowain: 573
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4. Faith:
Ichabod: 43.3
Bacchus: 37.8 - probably a lot more due to his pantheon.
Rowain: 3 fpt
I'm actually using my faith to buy missionaries now, instead of Wats. The only way I see myself losing this game is by a backdoor religious victory (which is very unlikely, but alas), so it's way better to just secure my position with the religious side of things than get a marginal science boost here and there.
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I don't know how much Gold per turn the others are generating, but I doubt they have more than my +154 gpt.
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If we take all these figures into account, we have the following result: Bacchus doesn't have the units to kill me (he likely doesn't have field cannons and he doesn't have cavalries) and Rowain doesn't have the production (low empire score + lack of needed cards). My lead will get increasingly bigger, my positions more fortified and there'll be nothing for them to do. I have a GG, they are far away from the other, which is from the same era as mine, so would only get a tie. A few more turns and I'm confident I can stand my ground against the two of them combined.
I have 4 quadrirremes in production or ready and I'm 1t from Frigates. I'll mass upgrade and burn Bacchus 2 coastal cities. That will set him down a bit. If Rowain intervenes, I'll raze his coastal cities as well. If he stays put, I'll wait until the proper time and then raze his coastal cities.
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I have 3 gigantic advantages in the game as well: Stockholm, Zanzibar and Geneva. I have the 3 suzerainities and, while Geneva is useless, due to my eternal war with Bacchus, the advantage there is that it's a scientific Civ state and the bonuses are very, very useful. And since Geneva is in my doorstep, no one puts envoys on them, because I'll just take the city as soon as anyone goes past me. I'm actually at only 4 envoys in Geneva (0 from the others), though I'm finally going to fulfill their quest of building a bombard (when I upgrade my catapult, that was only built due to another quest).
Stockholm bonus is very good, though I'm questioning a bit the value of a lot of the Great People. If we deem GPs worth it, though, then Stockholm is very powerful. It's basically having double the districts of everyone else (which is huge, especially when district buildings are so prohibetively expensive)... I'm the Suzerain with more than 6 envoys, so I get +6 (coupled with Geneva) in all my Campuses right now (which is why I'm basically spamming them in all my cities that don't have them yet). I guess my suzerainities of both science city states explain why Bacchus has so little science. He doesn't get any bonus from them. Meanwhile, Stockholm is very close to me, so Bacchus can't kill them to take my bonuses away from me.
Zanzibar currently gives me 4 amenities, 2 from the suzerain and 2 from their terrain. That's massive, I'd be drowning in unhapiness if not for that. The bonus is so important that you can see that I'm floating 2 envoys. If Rowain ties me or passes me, I have an insurance to keep this bonus. Also, it's 8 gpt in every commercial hub, which is very powerful in its own right. Zanzibar is pretty exposed, but they have a large military and the player close to them is Rowain, who also gets their gold bonus, so I don't think he plans to take them down.
The city state placement defines a lot in the Civ 6 MP game. Bacchus got Suzerainity from Yerevan, Preslav and Jerusalem, but I captured them all, denying the bonuses. Meanwhile, my city states are closer to me, so I can guard them (baring Zanzibar, which I explained above why I think it's safe). You could say that the map favoured me in this regard, but it's not true. A lot of these cities were on Kaiser and Suboptimal spheres of influence, but they were defeated and I expanded towards their land. So, I have a bit of credit in that department.
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I'm very close to Industrialism, as I have Mass Production and Sqaure Rigging on 1t left and I'll be finishing the 3 Workshops Eureka this turn. That will give me +1 hammer per mine and my lead will become even bigger (I don't think anyone else is close to this techs). Not even sure where I'll go after that, likely to Tanks, so I can keep a military edge by upgrading my Knights (building some more knights and cavalry while I'm at it as well). I have very little knowledge of the Civ 6 tech tree past Industrial Era.
I plopped down a whole lot of new districts, as my cities started reaching size 7 and 10. I favoured Campuses, as they give me the most benefit right away, from my CS allies. I place RNDY where possible as well. I built some Theaters, just to give a little pressure into Bacchus GP generation (he'll likely get the next Writer as well, but I can probably get the GArtist and the Musician, for whatever that's worth) and because they were discounted, but I'm not even sure if that was a good idea. Holy Sites are better for culture in my position, due to Choral Music, and I think science is more important, in this time of the game. Ah, I also want to build a special English museum, just for the sake of it.
Ah, I'm pretty sure Bacchus was up to +4 GPP per turn for both Artists and Musicians, but last turn he was back to +2 GPP. What happened? I didn't take a city from him, he's allied to Rowain, how can he lose GPP? Perhaps it's an interface bug, as the one that happened in our SG.
I'll have more to say about districts in a later post, about the Civ 6 MP sa a whole, that I promised above.