Theft Formula

Theft Formula

Here is the data posted on Five on Friday:

Here is the formula for stealing when stealing from another player:

First we need to determine a couple of things:
skillModifier = 100 + Stealing Skill Value.
(Example: GM Stealing, 100 + 1000 = 1100).

targetingFactor = 1 for a random steal
targetingFactor = 3 for a planned theft.

itemWeight = the weight of the item (the maximum weight you can steal is 15 stones)
(Example: 7 stones).

Then we calculate the difficulty modifier:
Difficulty = itemWeight * targetingFactor * 2000 / skillModifier.

(Example: if thief has GM stealing, and the stolen object was a planned theft and weighed 7 stones, the difficulty would be:

Difficulty = 7 * 3 * 2000 / 1100.
Difficulty = 38 (all fractions are rounded down).)
This is the resulting difficulty table resulting from the formula. It is based on a targeted steal. Any random steal will be 1/3 the difficulty. I think this difficulty table uses a different success chance than the next one, so I'm not sure what this actually means.

Still following? It gets more interesting when witnesses are in the area.

If there are witnesses in the area, the game performs a complicated set of calculations to determine if any of them noticed the crime. The difficulty calculation above factors into it, as well as the monetary value of the stolen item - and each NPC or player in the theft area runs the check, so the more people around, the more likely you are to be noticed. The calculation returns a yes or no value - either there are witnesses or there aren't.

If there are no witnesses, the thief successfully steals the item.

However, if there are witnesses, you're not guaranteed to fail - you just need to pass another difficulty check.

Difficulty = itemWeight * targetingFactor * 30 + 100.

(Sticking to our above example of a stolen item weighing 7 stones and a planned theft, here is the calculation:

Difficulty = 7 * 3 * 30 + 100
Difficulty = 730)
The following table uses the above information and is here just to be placed in the one below it.

The difficulty is then plugged in to the following calculation:

500 + 2 * (Thief skill - difficulty)) / 10 = percent chance of success

(Example: (500 + 2 * (1000 - 730)) / 10 = 104%, or a guaranteed success.)
...and this is the big important table. Find your skill column, and the weight of the item in the ()

-Spock the Thief
3-29-07

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