Home » Stars! 2.6/7 » The Academy » Guts of Defense building? (Determining how many defenses a planet can build)
Guts of Defense building? |
Mon, 12 October 2020 14:40 |
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Scenario: A player dropped out. There is a planet belonging to that player in my space that I would like to capture with mines and factories fully intact. I am not IS. I do not have huge stockpiles of minerals for throwing multiple 10k packets.
Supposition: that a combination of smart bombs, with packets when the defense percentages fall, and pop bombs when defense percentages are low, is a reasonably efficient way to take the planet. I am not saying this is fast.
In order to do this, it is easier if I can calculate what the defense percentages will be when the (approximate) pop of a planet falls. I.e. If a planet has 100 defenses, and the pop after bombing is 200k, what percentage of the defenses will still operate?
In old writings it is said that less defenses can be operated when then population of a planet falls below 250k. (I was just suggested to me that) This number may however be 25% of the total pop. So the numbers will change for OBRM, HE and Joat.
But I am still missing part of the equation. I have planets that I am terraforming myself, and the number of defenses that I can build is not a linear factor of total pop. There is at least one other factor.
Does anyone know the formula for determining how many defenses can be built on a planet?
RainDancer
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Re: Guts of Defense building? |
Tue, 13 October 2020 02:38 |
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magic9mushroom | | Commander | Messages: 1369
Registered: May 2008 | |
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The formula I've heard is 1 defence per 2500 people linear (so 200k would operate 80 defences). The trick is that like mines and factories, the amount of pop operating installations is capped by the planetary maxpop (equal to %hab*HW cap for greens above 5%, or 5% of HW cap for anything else).
If that's not accurate then I don't know.
(This is why Orbital Adjusters are useful for aiding bombing; by lowering the habitability of a planet the maxpop falls and if it goes under 250k some of the defences will become inoperable.)
[Updated on: Tue, 13 October 2020 02:51] Report message to a moderator
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Re: Guts of Defense building? |
Tue, 13 October 2020 03:17 |
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ricks03 | | | Messages: 231
Registered: January 2012 Location: NC | |
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It should be 1 defense for each 2500, with the pop cap as the max who _can_ work defenses (and uninhabitable will be 50k IIRC)
A reminder that if you kill off 100% of the population, all the factories and mines will go away, so you'll have to invade that same turn. Order of events will then become important. If you're planning bombing, packets, and pop drop, you'll want the pop drop to be a waypoint 1 order. Packets will hit, them bombing, then WP1 pop drop. If you want to gain tech, there will still need to be a few survivors to ... assist ... with your tech gain as well.
also worth nothing that multiple packets might be more effective at wiping the defenses out, as each packet will destroy defenses which won't be there for later packets.
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Re: Guts of Defense building? |
Tue, 13 October 2020 03:32 |
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magic9mushroom | | Commander | Messages: 1369
Registered: May 2008 | |
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ricks03 wrote on Tue, 13 October 2020 18:17A reminder that if you kill off 100% of the population, all the factories and mines will go away, so you'll have to invade that same turn.
Never heard this myself. Packets destroy defences, and a world reduced to 0 loses defences/planetary scanner/techsteal possibility, but I've not heard of factories or mines going away from planet-killer packets. Will check.
EDIT: Mines and factories persist on uninhabited worlds. Defences go away. I have now tested this personally.
[Updated on: Tue, 13 October 2020 03:41] Report message to a moderator
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Re: Guts of Defense building? |
Tue, 13 October 2020 03:51 |
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magic9mushroom | | Commander | Messages: 1369
Registered: May 2008 | |
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ricks03 wrote on Tue, 13 October 2020 18:43magic9mushroom wrote on Tue, 13 October 2020 03:32ricks03 wrote on Tue, 13 October 2020 18:17A reminder that if you kill off 100% of the population, all the factories and mines will go away, so you'll have to invade that same turn.
Never heard this myself. Packets destroy defences, and a world reduced to 0 loses defences/planetary scanner/techsteal possibility, but I've not heard of factories or mines going away from planet-killer packets. Will check. It's not the packet that destroys the factories. It's the going to 0. Once it's at 0 and you have to recolonize, the factories/mines will be 0. So you have to get troops on the ground the same turn if the pop goes to 0.
And I'm telling you that planets at 0 pop do not lose mines and factories. I left a planet uninhabited for a turn and recolonised and they were all still there.
Defences, the planetary scanner and the invasion techsteal possibility go away when a planet is at 0. Mines and factories do not. I specifically just tested this for mines, factories and defences; you are not going to be able to convince me otherwise.
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Re: Guts of Defense building? |
Tue, 13 October 2020 10:09 |
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Back to the point of the post.
Some examples from my current game. Joat and OBRM, so roughly 1 defense per 3300 pop.
24/86 planet with 316k pop can build 96 defenses.
36/82 planet with 204k pop can build 82 defenses.
37/55 planet with 196K pop can build 75 defenses.
16/69 planet with 211k pop can build 64 defenses.
So the number of defenses that can be built is related to pop, but not linear. There is at least one other factor here.
An assumption here is that the number of defenses that can be built is the same as the number that are effective when pop has been reduced on a planet.
RainDancer
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Re: Guts of Defense building? |
Tue, 13 October 2020 12:37 |
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Okay. I did not check the basics.
I have an 83/86 planet, the only planet with 4 empty freighters in orbit.
I took off pop until the defenses started to go down.
Stayed at 100 defenses until I got less then 250k pop. It went down 1 defense with every 2500 pop. Joat and OBRM do not matter.
SO... that probably means that the defenses work at 1/2500, except then the planet is below nn%, my guess would be 50%.
So if I am attacking old planets that have been terraformed, odds are good that the standard formula applies. If I am attacking planets that are smaller (for the person I am attacking, not for me) it is using a more complicated formula, and likely will allow somewhat fewer defenses.
Posey probably has a sheet that will help me determine rough opponent habs and percentage of a planet I am attacking.
EmbarrassedDancer
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Re: Guts of Defense building? |
Wed, 14 October 2020 22:35 |
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ricks03 | | | Messages: 231
Registered: January 2012 Location: NC | |
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magic9mushroom wrote on Tue, 13 October 2020 03:51ricks03 wrote on Tue, 13 October 2020 18:43magic9mushroom wrote on Tue, 13 October 2020 03:32ricks03 wrote on Tue, 13 October 2020 18:17A reminder that if you kill off 100% of the population, all the factories and mines will go away, so you'll have to invade that same turn.
Never heard this myself. Packets destroy defences, and a world reduced to 0 loses defences/planetary scanner/techsteal possibility, but I've not heard of factories or mines going away from planet-killer packets. Will check. It's not the packet that destroys the factories. It's the going to 0. Once it's at 0 and you have to recolonize, the factories/mines will be 0. So you have to get troops on the ground the same turn if the pop goes to 0.
And I'm telling you that planets at 0 pop do not lose mines and factories. I left a planet uninhabited for a turn and recolonised and they were all still there.
Defences, the planetary scanner and the invasion techsteal possibility go away when a planet is at 0. Mines and factories do not. I specifically just tested this for mines, factories and defences; you are not going to be able to convince me otherwise. Tested it myself. I stand corrected.
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Re: Guts of Defense building? |
Fri, 11 December 2020 08:19 |
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Braindead wrote on Fri, 11 December 2020 05:43Raindancer wrote
Supposition: that a combination of smart bombs, with packets when the defense percentages fall, and pop bombs when defense percentages are low, is a reasonably efficient way to take the planet. I am not saying this is fast.
It's usually faster (and can be cheaper) to kill the planet with cherries and rebuild.
Depends on too may factors to say for all cases. My very rough calculations were that it was a few turns quicker to use the bombing. But in this case the biggest savings was Germ. I had a lot of planets with low Germ percentages, so capturing the planets with the factories intact saved me a lot there.
FrugalDancer
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Re: Guts of Defense building? |
Thu, 20 June 2024 04:44 |
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magic9mushroom | | Commander | Messages: 1369
Registered: May 2008 | |
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Just did a test, AFAIK this is how it works:
Max defences buildable = 4 * hab%, min 10 max 100.
Defences operatable = pop/2500 rounded up.
Notes:
1) Yellows/reds are not 5% worlds for purposes of max-defences; they're 2.5%.
2) JoAT, OBRM and HE do not affect max-defences-buildable, so a JoAT/OBRM race with a 20% world can have 264,000 people but can only build 80 defences, and a non-3i OBRM HE needs to overpop in order to operate all defences on a world between 3% and 45% (not on yellows/reds, though, due to #1) - note that overpop does indeed operate defences at the same pop/2500 rate.
3) Autobuild will build up to "defences operatable"; "max defences buildable" limits even manual building.
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