Preconditions:
- To be able to block, you must have a shield and Block > Accuracy of attacker
- To be able to parry, no need to be equipped. However it is necessary that Parry > Accuracy of the attacker
- To be able to evade, the only precondition is that Evasion > Accuracy of the attacker
Maximum values:
- On average, not more than 50% of attacks can be blocked
- On average, not more than 40% of attacks can be parried
- On average, not more than 30% of attacks can be evaded
Considering Block/Parry/Evasion in isolation:
Gebator gives the general formula (<Stat> - Accuracy) / 10 for the probability, that must then be checked against above maximum values. Example: If the attacker has 500 Accuracy and the defender 800 Block, then the defender will block (800-500) / 10 = 30 percent of attacks.
Consequently he deduces the maximum probabilities are reached:
- For evading: With 300 more Evasion than Accuracy of the opponent.
- For parrying: With 400 more Parry than Accuracy of the opponent.
- For blocking: With 500 more Block than Accuracy of the opponent.
Interplay of these statistics:
Note that Evasion has priority over Parry, and Parry has priority over Block. The game makes a first random drawing to test, if there is an evasion or not, then a second drawing to test parry or not, then a third drawing to test block or not.
Thus when speaking of 40% block chance, we speak of conditional probability: we have 40% chance to block, under the condition of having previously missed the test for evasion, then missed the test for parry.
For example, let evasion chance be 30%, parry chance 40%, and block chance 50%:
- Evasion comes first, thus we actually evade in 30% of cases.
- In order to parry, the evasion test must have missed (70% probability). In practice: 70% * 40% = 28% of cases.
- In order to block, the evasion test must have missed (70% probability), as well as the test for parry (60% probability). Thus block happens in 70% * 60* 50% = 21% of cases.
- Consequently in total we have 30% + 28% +21% = 79% probability of the attack being evaded or parried or blocked; Thus 21% probability to suffer from the full force of the attack.