Detection chances for Tactical/Strategic DE missions and Troop Columns
Detection chances for Tactical/Strategic DE missions and Troop Columns
An extension to the discussion in this past thread. I'm using this script to generate these numbers. Graphs would be nice but I won't be making them myself (at least, not today).
EDIT: the numbers were based on a flawed formula. Corrected down below with new numbers in a more intuitive format.
EDIT: the numbers were based on a flawed formula. Corrected down below with new numbers in a more intuitive format.
Last edited by Psieye on Mon Aug 21, 2017 11:48 am, edited 1 time in total.
Re: Detection chances for Tactical/Strategic DE missions and Troop Columns
You forgot to divide the chance in each roll by 4.
Re: Detection chances for Tactical/Strategic DE missions and Troop Columns
Just to confirm, you're saying my script should look like this for the return value of functionChance()?
Code: Select all
discoveryPctChancePerDayPerHundredMissionIncome/4 * surplusIntel/100
Re: Detection chances for Tactical/Strategic DE missions and Troop Columns
Exactly. The game multiplies the chance by (number of hours between rolls)/24 and the number of hours between rolls is 6.Psieye wrote:Just to confirm, you're saying my script should look like this for the return value of functionChance()?
Code: Select all
discoveryPctChancePerDayPerHundredMissionIncome/4 * surplusIntel/100

 Posts: 940
 Joined: Mon Jan 23, 2017 1:34 pm
Re: Detection chances for Tactical/Strategic DE missions and Troop Columns
Psieye, just to be sure, your script returns a chance per "tick" like this :Psieye wrote:An extension to the discussion in this past thread. I'm using this script to generate these numbers. Graphs would be nice but I won't be making them myself (at least, not today).
Code: Select all
1 ticks > 0%
2 ticks > 0%
3 ticks > 0%
4 ticks > 0%
5 ticks > 1.8750000000000044%
It's interesting. I wish i could have a simple spreadsheet formula but it's probably not possible due to the loop in the function. Anyway i plan to run that script various activities once i have confirmation what a "tick" is. Thanks for this (works nicely in Firefox console BTW).
facket, if i remember correctly, some time ago you corrected me about the amount of intel generated by a rebel each day. Can you remind me the exact amount of intel generated by a level 1 rebel. I think it will be easier to use for me if i rewrite that formula to take a number of rebels as input rather than intelPerDay.faket15 wrote: Exactly. The game multiplies the chance by (number of hours between rolls)/24 and the number of hours between rolls is 6.
Re: Detection chances for Tactical/Strategic DE missions and Troop Columns
Yes, a tick is 6 hours. I've been meaning to revisit this over the weekend but uh... things got interesting in my campaign. Let's see if I can rip myself away from LW2 to write this up better. Oh and if you want to put this into spreadsheets, I can update the script to spit out CSVs.

 Posts: 940
 Joined: Mon Jan 23, 2017 1:34 pm
Re: Detection chances for Tactical/Strategic DE missions and Troop Columns
I don't think it will be required, i think finally managed to understand your script enough to dissect the functions and variables into spreadsheet columns which mean i'll be able to get all the output i want directly once i finish arranging a monstrous table
The script is probably cleaner but at least once i have it in a spreadsheet i can just change a few parameters such as number of rebels, avenger scan, presence of tower and such and get all the results updated immediately.
joinrbs actually already created a similar spreadsheet but it was for some specific missions only and i always wanted a more global version, looks like i finally found the formulas required thanks to your script.
Next step will be plotting this against number of days left to infiltrate
The script is probably cleaner but at least once i have it in a spreadsheet i can just change a few parameters such as number of rebels, avenger scan, presence of tower and such and get all the results updated immediately.
joinrbs actually already created a similar spreadsheet but it was for some specific missions only and i always wanted a more global version, looks like i finally found the formulas required thanks to your script.
Next step will be plotting this against number of days left to infiltrate
Re: Detection chances for Tactical/Strategic DE missions and Troop Columns
Script updated:
For each row in the output, the first number is "number of rebels on intel job". Then each subsequent item is the cumulative success chance after X ticks. Hmm... I could tinker this further as what we really want to know is "what should I put in to get X% chance of discovery by Y ticks?" But for now, I have a 7man hack mission to play.
Code: Select all
function discoveryChance(intelPerDay, requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, ticks) {
const currentIntel = ticks * intelPerDay / 4;
const surplusIntel = currentIntel  requiredRebelMissionIncome;
if (surplusIntel <= 0) {
return 0;
}
return discoveryPctChancePerDayPerHundredMissionIncome/4 * surplusIntel/100;
}
function calculateCumulativeSuccessChance(intelPerDay, requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, ticks) {
let cumulativeFailChance = 1;
let ret = [];
for (i = 1; i <= ticks; i++) {
cumulativeFailChance *= (1  discoveryChance(intelPerDay, requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, i)/100);
cumulativeSuccessPct = (1cumulativeFailChance)*100;
ret.push(Math.round(cumulativeSuccessPct)+"%");
}
return ret;
}
function printResultsSet(requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, totalTicks, scientistAdvisor, radioTower) {
for (j = 1; j <= 13; j++) {
let intelPerDay = j * 5;
if (scientistAdvisor) {
intelPerDay *= 1.2;
}
if (radioTower) {
intelPerDay *= 1.2;
}
resultsSet = calculateCumulativeSuccessChance(intelPerDay, requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, totalTicks);
console.log(j + ", " + calculateCumulativeSuccessChance(intelPerDay, requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, totalTicks).join(", "));
}
}
printResultsSet(100, 30, 40, true, true);

 Posts: 940
 Joined: Mon Jan 23, 2017 1:34 pm
Re: Detection chances for Tactical/Strategic DE missions and Troop Columns
Finished my spreadsheet (i think the numbers should be correct). Still room for improvement and more parameters to consider.
Thanks for the script as it gave me the basis to build the spreadsheet
Thanks for the script as it gave me the basis to build the spreadsheet
Re: Detection chances for Tactical/Strategic DE missions and Troop Columns
New script:
Some output from this, assuming Lv 1 rebels, no Faceless, radio tower and no scientist:
=== Normal UFO lead ===
Duration: 59 days
6 rebels need 8 days to detect with at least 80% chance. 9.75 days to detect with at least 95% chance.
7 rebels need 7.25 days to detect with at least 80% chance. 9 days to detect with at least 95% chance.
8 rebels need 6.75 days to detect with at least 80% chance. 8.25 days to detect with at least 95% chance.
9 rebels need 6.25 days to detect with at least 80% chance. 7.5 days to detect with at least 95% chance.
10 rebels need 5.75 days to detect with at least 80% chance. 7 days to detect with at least 95% chance.
11 rebels need 5.5 days to detect with at least 80% chance. 6.75 days to detect with at least 95% chance.
12 rebels need 5 days to detect with at least 80% chance. 6.25 days to detect with at least 95% chance.
13 rebels need 4.75 days to detect with at least 80% chance. 6 days to detect with at least 95% chance.
=== Super UFO lead ===
Duration: 59 days
5 rebels need 8 days to detect with at least 80% chance. 10 days to detect with at least 95% chance.
6 rebels need 7.25 days to detect with at least 80% chance. 8.75 days to detect with at least 95% chance.
7 rebels need 6.5 days to detect with at least 80% chance. 8 days to detect with at least 95% chance.
8 rebels need 6 days to detect with at least 80% chance. 7.5 days to detect with at least 95% chance.
9 rebels need 5.5 days to detect with at least 80% chance. 6.75 days to detect with at least 95% chance.
10 rebels need 5.25 days to detect with at least 80% chance. 6.5 days to detect with at least 95% chance.
11 rebels need 4.75 days to detect with at least 80% chance. 6 days to detect with at least 95% chance.
12 rebels need 4.5 days to detect with at least 80% chance. 5.75 days to detect with at least 95% chance.
13 rebels need 4.25 days to detect with at least 80% chance. 5.5 days to detect with at least 95% chance.
=== Find Facility lead ===
Duration: 912 days
5 rebels need 11.75 days to detect with at least 80% chance. 14.5 days to detect with at least 95% chance.
6 rebels need 10.5 days to detect with at least 80% chance. 12.75 days to detect with at least 95% chance.
7 rebels need 9.5 days to detect with at least 80% chance. 11.75 days to detect with at least 95% chance.
8 rebels need 8.5 days to detect with at least 80% chance. 10.75 days to detect with at least 95% chance.
9 rebels need 8 days to detect with at least 80% chance. 10 days to detect with at least 95% chance.
10 rebels need 7.5 days to detect with at least 80% chance. 9.25 days to detect with at least 95% chance.
11 rebels need 7 days to detect with at least 80% chance. 8.75 days to detect with at least 95% chance.
12 rebels need 6.5 days to detect with at least 80% chance. 8.25 days to detect with at least 95% chance.
13 rebels need 6.25 days to detect with at least 80% chance. 8 days to detect with at least 95% chance.
=== Smash & Grab ===
Duration: 913 days
3 rebels need 10.25 days to detect with at least 80% chance. 12 days to detect with at least 95% chance.
4 rebels need 8.25 days to detect with at least 80% chance. 9.75 days to detect with at least 95% chance.
5 rebels need 7 days to detect with at least 80% chance. 8.5 days to detect with at least 95% chance.
6 rebels need 6.25 days to detect with at least 80% chance. 7.5 days to detect with at least 95% chance.
7 rebels need 5.5 days to detect with at least 80% chance. 6.75 days to detect with at least 95% chance.
8 rebels need 5 days to detect with at least 80% chance. 6 days to detect with at least 95% chance.
9 rebels need 4.75 days to detect with at least 80% chance. 5.75 days to detect with at least 95% chance.
10 rebels need 4.25 days to detect with at least 80% chance. 5.25 days to detect with at least 95% chance.
11 rebels need 4 days to detect with at least 80% chance. 5 days to detect with at least 95% chance.
12 rebels need 3.75 days to detect with at least 80% chance. 4.75 days to detect with at least 95% chance.
13 rebels need 3.5 days to detect with at least 80% chance. 4.5 days to detect with at least 95% chance.
=== Troop Column ===
Duration: 912 days
NB: ignores the bonus detect chance from Str that Troop Columns have.
3 rebels need 9.5 days to detect with at least 80% chance. 12.75 days to detect with at least 95% chance.
4 rebels need 8.25 days to detect with at least 80% chance. 11 days to detect with at least 95% chance.
5 rebels need 7.25 days to detect with at least 80% chance. 9.75 days to detect with at least 95% chance.
6 rebels need 6.75 days to detect with at least 80% chance. 8.75 days to detect with at least 95% chance.
7 rebels need 6.25 days to detect with at least 80% chance. 8.25 days to detect with at least 95% chance.
8 rebels need 5.75 days to detect with at least 80% chance. 7.75 days to detect with at least 95% chance.
9 rebels need 5.5 days to detect with at least 80% chance. 7.25 days to detect with at least 95% chance.
10 rebels need 5 days to detect with at least 80% chance. 6.75 days to detect with at least 95% chance.
11 rebels need 4.75 days to detect with at least 80% chance. 6.5 days to detect with at least 95% chance.
12 rebels need 4.75 days to detect with at least 80% chance. 6.25 days to detect with at least 95% chance.
13 rebels need 4.5 days to detect with at least 80% chance. 6 days to detect with at least 95% chance.
=== Tactical DE ===
Duration: ??? (at least 10 days minimum for all but Conditioning)
8 rebels need 11.5 days to detect with at least 80% chance. 15 days to detect with at least 95% chance.
9 rebels need 10.75 days to detect with at least 80% chance. 14 days to detect with at least 95% chance.
10 rebels need 10.25 days to detect with at least 80% chance. 13 days to detect with at least 95% chance.
11 rebels need 9.5 days to detect with at least 80% chance. 12.5 days to detect with at least 95% chance.
12 rebels need 9 days to detect with at least 80% chance. 11.75 days to detect with at least 95% chance.
13 rebels need 8.75 days to detect with at least 80% chance. 11.25 days to detect with at least 95% chance.
=== Strategic DE ===
Duration: ??? (at least 10 days minimum for all but Air Patrols)
6 rebels need 10.5 days to detect with at least 80% chance. 13.75 days to detect with at least 95% chance.
7 rebels need 9.75 days to detect with at least 80% chance. 12.5 days to detect with at least 95% chance.
8 rebels need 9 days to detect with at least 80% chance. 11.5 days to detect with at least 95% chance.
9 rebels need 8.5 days to detect with at least 80% chance. 10.75 days to detect with at least 95% chance.
10 rebels need 8 days to detect with at least 80% chance. 10.25 days to detect with at least 95% chance.
11 rebels need 7.5 days to detect with at least 80% chance. 9.75 days to detect with at least 95% chance.
12 rebels need 7 days to detect with at least 80% chance. 9.25 days to detect with at least 95% chance.
13 rebels need 6.75 days to detect with at least 80% chance. 8.75 days to detect with at least 95% chance.
Code: Select all
function discoveryChance(intelPerDay, requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, ticks) {
const currentIntel = ticks * intelPerDay / 4;
const surplusIntel = currentIntel  requiredRebelMissionIncome;
if (surplusIntel <= 0) {
return 0;
}
return discoveryPctChancePerDayPerHundredMissionIncome/4 * surplusIntel/100;
}
function calculateTicksForSuccessThreshold(intelPerDay, requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, maxTicks, successThreshold) {
let cumulativeFailChance = 1;
for (let i = 1; i <= maxTicks; i++) {
cumulativeFailChance *= (1  discoveryChance(intelPerDay, requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, i) / 100);
const cumulativeSuccessPct = Math.round((1cumulativeFailChance)*100);
if (cumulativeSuccessPct >= successThreshold) {
return i;
}
}
return 1;
}
function printRebelsToDetect(requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, scientistAdvisor, radioTower) {
const maxTicks = 60;
for (j = 1; j <= 13; j++) {
let intelPerDay = j * 5;
if (scientistAdvisor) {
intelPerDay *= 1.2;
}
if (radioTower) {
intelPerDay *= 1.2;
}
const requiredTicks_80 = calculateTicksForSuccessThreshold(intelPerDay, requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, maxTicks, 80);
const requiredTicks_95 = calculateTicksForSuccessThreshold(intelPerDay, requiredRebelMissionIncome, discoveryPctChancePerDayPerHundredMissionIncome, maxTicks, 95);
if (requiredTicks_80 != 1) {
const extra = requiredTicks_95 == 1 ? "" : " " + requiredTicks_95/4 + " days to detect with at least 95% chance.";
console.log(j + " rebels need " + requiredTicks_80/4 + " days to detect with at least 80% chance." + extra);
}
}
}
printRebelsToDetect(100, 30, false, true);
=== Normal UFO lead ===
Duration: 59 days
6 rebels need 8 days to detect with at least 80% chance. 9.75 days to detect with at least 95% chance.
7 rebels need 7.25 days to detect with at least 80% chance. 9 days to detect with at least 95% chance.
8 rebels need 6.75 days to detect with at least 80% chance. 8.25 days to detect with at least 95% chance.
9 rebels need 6.25 days to detect with at least 80% chance. 7.5 days to detect with at least 95% chance.
10 rebels need 5.75 days to detect with at least 80% chance. 7 days to detect with at least 95% chance.
11 rebels need 5.5 days to detect with at least 80% chance. 6.75 days to detect with at least 95% chance.
12 rebels need 5 days to detect with at least 80% chance. 6.25 days to detect with at least 95% chance.
13 rebels need 4.75 days to detect with at least 80% chance. 6 days to detect with at least 95% chance.
=== Super UFO lead ===
Duration: 59 days
5 rebels need 8 days to detect with at least 80% chance. 10 days to detect with at least 95% chance.
6 rebels need 7.25 days to detect with at least 80% chance. 8.75 days to detect with at least 95% chance.
7 rebels need 6.5 days to detect with at least 80% chance. 8 days to detect with at least 95% chance.
8 rebels need 6 days to detect with at least 80% chance. 7.5 days to detect with at least 95% chance.
9 rebels need 5.5 days to detect with at least 80% chance. 6.75 days to detect with at least 95% chance.
10 rebels need 5.25 days to detect with at least 80% chance. 6.5 days to detect with at least 95% chance.
11 rebels need 4.75 days to detect with at least 80% chance. 6 days to detect with at least 95% chance.
12 rebels need 4.5 days to detect with at least 80% chance. 5.75 days to detect with at least 95% chance.
13 rebels need 4.25 days to detect with at least 80% chance. 5.5 days to detect with at least 95% chance.
=== Find Facility lead ===
Duration: 912 days
5 rebels need 11.75 days to detect with at least 80% chance. 14.5 days to detect with at least 95% chance.
6 rebels need 10.5 days to detect with at least 80% chance. 12.75 days to detect with at least 95% chance.
7 rebels need 9.5 days to detect with at least 80% chance. 11.75 days to detect with at least 95% chance.
8 rebels need 8.5 days to detect with at least 80% chance. 10.75 days to detect with at least 95% chance.
9 rebels need 8 days to detect with at least 80% chance. 10 days to detect with at least 95% chance.
10 rebels need 7.5 days to detect with at least 80% chance. 9.25 days to detect with at least 95% chance.
11 rebels need 7 days to detect with at least 80% chance. 8.75 days to detect with at least 95% chance.
12 rebels need 6.5 days to detect with at least 80% chance. 8.25 days to detect with at least 95% chance.
13 rebels need 6.25 days to detect with at least 80% chance. 8 days to detect with at least 95% chance.
=== Smash & Grab ===
Duration: 913 days
3 rebels need 10.25 days to detect with at least 80% chance. 12 days to detect with at least 95% chance.
4 rebels need 8.25 days to detect with at least 80% chance. 9.75 days to detect with at least 95% chance.
5 rebels need 7 days to detect with at least 80% chance. 8.5 days to detect with at least 95% chance.
6 rebels need 6.25 days to detect with at least 80% chance. 7.5 days to detect with at least 95% chance.
7 rebels need 5.5 days to detect with at least 80% chance. 6.75 days to detect with at least 95% chance.
8 rebels need 5 days to detect with at least 80% chance. 6 days to detect with at least 95% chance.
9 rebels need 4.75 days to detect with at least 80% chance. 5.75 days to detect with at least 95% chance.
10 rebels need 4.25 days to detect with at least 80% chance. 5.25 days to detect with at least 95% chance.
11 rebels need 4 days to detect with at least 80% chance. 5 days to detect with at least 95% chance.
12 rebels need 3.75 days to detect with at least 80% chance. 4.75 days to detect with at least 95% chance.
13 rebels need 3.5 days to detect with at least 80% chance. 4.5 days to detect with at least 95% chance.
=== Troop Column ===
Duration: 912 days
NB: ignores the bonus detect chance from Str that Troop Columns have.
3 rebels need 9.5 days to detect with at least 80% chance. 12.75 days to detect with at least 95% chance.
4 rebels need 8.25 days to detect with at least 80% chance. 11 days to detect with at least 95% chance.
5 rebels need 7.25 days to detect with at least 80% chance. 9.75 days to detect with at least 95% chance.
6 rebels need 6.75 days to detect with at least 80% chance. 8.75 days to detect with at least 95% chance.
7 rebels need 6.25 days to detect with at least 80% chance. 8.25 days to detect with at least 95% chance.
8 rebels need 5.75 days to detect with at least 80% chance. 7.75 days to detect with at least 95% chance.
9 rebels need 5.5 days to detect with at least 80% chance. 7.25 days to detect with at least 95% chance.
10 rebels need 5 days to detect with at least 80% chance. 6.75 days to detect with at least 95% chance.
11 rebels need 4.75 days to detect with at least 80% chance. 6.5 days to detect with at least 95% chance.
12 rebels need 4.75 days to detect with at least 80% chance. 6.25 days to detect with at least 95% chance.
13 rebels need 4.5 days to detect with at least 80% chance. 6 days to detect with at least 95% chance.
=== Tactical DE ===
Duration: ??? (at least 10 days minimum for all but Conditioning)
8 rebels need 11.5 days to detect with at least 80% chance. 15 days to detect with at least 95% chance.
9 rebels need 10.75 days to detect with at least 80% chance. 14 days to detect with at least 95% chance.
10 rebels need 10.25 days to detect with at least 80% chance. 13 days to detect with at least 95% chance.
11 rebels need 9.5 days to detect with at least 80% chance. 12.5 days to detect with at least 95% chance.
12 rebels need 9 days to detect with at least 80% chance. 11.75 days to detect with at least 95% chance.
13 rebels need 8.75 days to detect with at least 80% chance. 11.25 days to detect with at least 95% chance.
=== Strategic DE ===
Duration: ??? (at least 10 days minimum for all but Air Patrols)
6 rebels need 10.5 days to detect with at least 80% chance. 13.75 days to detect with at least 95% chance.
7 rebels need 9.75 days to detect with at least 80% chance. 12.5 days to detect with at least 95% chance.
8 rebels need 9 days to detect with at least 80% chance. 11.5 days to detect with at least 95% chance.
9 rebels need 8.5 days to detect with at least 80% chance. 10.75 days to detect with at least 95% chance.
10 rebels need 8 days to detect with at least 80% chance. 10.25 days to detect with at least 95% chance.
11 rebels need 7.5 days to detect with at least 80% chance. 9.75 days to detect with at least 95% chance.
12 rebels need 7 days to detect with at least 80% chance. 9.25 days to detect with at least 95% chance.
13 rebels need 6.75 days to detect with at least 80% chance. 8.75 days to detect with at least 95% chance.