### Author Topic: WHEN DID THE MIND CONTROL FORMULAS CHANGE?  (Read 798 times)

#### SIMON

• Commander
•     • • Posts: 696 ##### WHEN DID THE MIND CONTROL FORMULAS CHANGE?
« on: September 20, 2018, 01:24:56 am »
I was wondering why I was getting a percentage range on a mind control attempt, when did the formulas change to the following:

Psionic Formulas
The equations governing psionics are as follows:

Attack Strength (AS) = (Psi Strength * Psi Skill / 50) - (Distance / 2) + Random Number(0 to 55)
Defense Strength (DS) = Psi Strength + (Psi Skill / 5 ) + Difficulty

If AS > DS then psi attack is successful

Where:
Distance is the number of tiles between the attacker and defender.
Random Number is a dice roll that produces a value between 0 and 55
Difficulty represents the difficulty of the attack mode. Mind Control = 30, Panic = 10

I remember the old formula as:

perentage chance=100/56(AS-DS-D+C) where AS was attack str, DS=defence str, D=distance and C was a constant(25 for mind control, 45 for panic)

I actually like the introduction of the random number.

#### Warboy1982

• Commander
•     • • Posts: 2330
• Developer ##### Re: WHEN DID THE MIND CONTROL FORMULAS CHANGE?
« Reply #1 on: September 20, 2018, 02:14:45 am »
not sure what to tell you, it hasn't changed.

#### NKF

• Sergeant
•  • Posts: 36 ##### Re: WHEN DID THE MIND CONTROL FORMULAS CHANGE?
« Reply #2 on: September 20, 2018, 08:45:15 am »
If you are referring to the formula chronicled on the wiki, that is what we have currently have.

The other was an earlier incarnation of it that was worked out through tons of pen and paper tests and what knowledge was available at the time (e.g. the OSG). It has become more accurate as understanding of the inner workings of the game has improved.

OpenXcom, being built from reverse engineering the original game, will have gone straight to the correct formula.