AI-hammer... If he is getting 6H per turn on a archer, then either he has a pre-improoved square, or he is working a 3H forrest hill, and has a 3H city square... How do you get a 3H city square? Plain-hill-stone/marble are the most common (only?) option, right? If it is marble, then Oracle next is likely, I would think...
We know that the hammer AI is getting 6h and at least 4f. You can't do that with unimproved tiles, unless they are getting a production bonus on something.
We should check it again on turns 7 and 9.
Turn 7 is when a doubled granary would be finished, and turn 9 is when the 4f AI should grow to size 2, if not building a worker or settler.
"AI Hammer has built an archer already" means that the AI with 6hpt has already completed an archer, as can be concluded from his power going from 35K to 38K in the F9 Demo screen. That also tells us he isn't building the Oracle...yet.
Average (or max) power should have jumped on turn 2. An archer costs the AI 20 hammers, and they get 10 free in their first build.
However, they shouldn't choose to build a wonder at 6hpt in their only city.
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Should we still try and build the Oracle?
If the 6h AI has marble, but the 6h are currently unboosted, then that AI will likely beat us to the Oracle, even if we go for it.
If it doesn't have marble, then we could build it (although it would be tricky to do it outside the capital). The gains could be useful, but don't seem mind-blowing to me.
However, this reeks of mapmaker interference, and after he removed Priesthood, I think he intended for the Oracle to be a non-factor in our development. I do wish he'd killed it via a barb city instead though.