SDI Defense and Nuke shot down

[arretium]

Does anyone know what the percentage is of an actual shooting down of an ICBM or Tactical nuke?

I thought once an opponent in question builds SDI defense, you have a 25% chance of nuking that opponent with an ICBM, and a slightly or perhaps 200% higher chance (i.e. 50% chance) of hitting someone with a tactical nuke.

Well, sure enough, every time I play the computer on emperor level (or higher?), my nuke percentage against my computer opponents is no where near 25%. If I could nuke those bastards 25% of the time I'd be thrilled, I'm averaging more like 10%.


Which got me wondering... do Mobile SAMs, Mechanical Infantry, Jet fighters, and Mobile Infantry stack or otherwise increase the computer's percentage chance to shoot down a nuke missile? In other words, do they work with SDI defense to improve a players odds of stopping a nuke? Or I have just had a serious 10 game run of bad luck?

 

[Soneji]

It seems more dependant on which city you pick, as opposed to how often you try to pummel it...

 

[SPQR300]

Tactical nuke should detonate 62.5% of the time(100-(75/2))

 

[Thanny]

If I could nuke those bastards 25% of the time I'd be thrilled, I'm averaging more like 10%.

Keep in mind that the RNG in Civ is a bit streaky. If you launch 20 nukes, you shouldn't be terribly surprised if only 2 hit. But if launch 100, you'll get between 20 and 30 hits.