be disco, accept nothing less than 300
What's the field range in slots 7-8-9 now?
When I last played we'd aim for around 250 or so, but I saw that there's 10% more with Discoverer, and then there's Universe specific expansions too.
I'm in Wurren, and Discoverer, so should I be looking for 300 or so?
Planet fields are equal to (planet size/1000)^2 rounded down plus whatever bonus field number you get from the uni.
In slot 8, the normal range of planet sizes is 12490--15875, which is 156--252 fields base and 201 fields average*. Adding in Wurren's +25 fields and you get that, without Discoverer or Researcher alliance, you will get planets in the range of 181--277. However, the sizes are approximately normally distributed** with variance (iirc) around 650***, so the best in 20 tries will probably be something like a planet with size 15644, which is 244(+25) or 269 fields. (Doing the math with planet fields being normally distributed would give us 271 fields as the best, so it doesn't really matter which one we take.)
With +10% bonus from discoverer, this range is now 13739--17462, or in other words 188--304 fields base and 243 fields average. Then you add in Wurren's +25 fields, and so the range is 213-329, average 268. But again, because the normal distribution, most of your results will in the middle, and best in 20 attempts will be 296(+25) fields, or 321 fields total. Since you're unlikely to ever use more than 300 fields, I would instead go for something like 300 fields + lower temperature, as opposed to rolling for bigger planets.
With researcher, add another 5%, and with discoverer enhancement, increase the discoverer bonus by that much.
These are the sizes for Discoverer, I couldn't find a reference for non-disco:
*my number is smaller than the numbers on OGame wiki, because they just take the average of the min and max fields while I'm taking the average of the min/max size. The numbers are pretty close so this distinction doesn't matter in practice.
**For example, here's the distribution of planet diameters and planet field sizes for slot 3, fitted on 5642 colonies. The normal distribution fits very well in both cases, so I'm picking planet diameters since it seems more plausible to me that they're generated first. 
***edited to add: I think I misremembered and it's 590, but I'm not going to do the math again. Sorry!
anything above 280 is fine tbh... especilly with lifeforms.. + it ll take tons of time to fill all those spots with quality buildings
Display MoreWhat's the field range in slots 7-8-9 now?
When I last played we'd aim for around 250 or so, but I saw that there's 10% more with Discoverer, and then there's Universe specific expansions too.
I'm in Wurren, and Discoverer, so should I be looking for 300 or so?
Planet fields are equal to (planet size/1000)^2 rounded down plus whatever bonus field number you get from the uni.
This is a fantastic answer and far more than I expected! Thank you so much for the write-up, it's really useful and I think it'd be a good one to have in its own thread as a guide to planet sizes!
I have 2 planets 334 and 336 in Xuange no terraformers i think that's the biggest I've personally had probably won't ever use those fields but the options there lol
