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| − | When '''[[spellcasting]]''' the '''Fail''' column appears in the menu which occurs when using the '''[Z]''' [[commands|command]].
| + | #redirect [[Spellcasting#Calculating_spell_success_rate]] |
| − | | |
| − | To calculate [[spell]] '''failure''', you first need to sum together the penalties marked with a number sign (#) below. An increasing total penalty is worse for spellcasting, and is limited to a maximum of 20.
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| − | | |
| − | * The "BASE" value from the table below, depending on the character's class.
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| − | * If an "[[emergency]]" spell (noted with a + above), the "EMERG" field.
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| − | * If wearing any [[shield]], the amount in the "SHIELD" field.
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| − | * If wearing metallic [[armor|body armor]], the amount in the "SUIT" field.
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| − | * If also wearing a [[robe]], only add half the amount (rounded down).
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| − | * If wearing a robe without metallic armour, '''subtract''' the amount in the "SUIT" field.
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| − | * If wearing a metallic [[helmet]] other than the [[helm of brilliance]], add 4.(Metal helmets interfere with the mind.)
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| − | * Metallic [[gloves]] add 6 (casting channels through the hands).
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| − | * Metallic [[boots]] add 2 (all metal interferes to some degree).
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| − | * Subtract 4 if the spell is [[special spell|special]] to that class (see table).
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| − | | |
| − | {| class="prettytable striped"
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| − | !CLASS
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| − | !BASE
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| − | !EMERG
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| − | !SHIELD
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| − | !SUIT
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| − | !STAT
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| − | !SPECIAL SPELL
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| − | |-
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| − | | Archeologist
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| − | | 5#
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| − | | 0#
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| − | | 2#
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| − | | 10#
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| − | | Int
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| − | | [[Magic mapping]]
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| − | |-
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| − | | Barbarian
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| − | | 14#
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| − | | 0#
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| − | | 0#
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| − | | 8#
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| − | | Int
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| − | | [[Haste self]]
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| − | |-
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| − | | Caveman
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| − | | 12#
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| − | | 0#
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| − | | 1#
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| − | | 8#
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| − | | Int
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| − | | [[Dig]]
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| − | |-
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| − | | Healer
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| − | | 3#
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| − | | -3#
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| − | | 2#
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| − | | 10#
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| − | | Wis
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| − | | [[Cure sickness]]
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| − | |-
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| − | | Knight
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| − | | 8#
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| − | | -2#
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| − | | 0#
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| − | | 9#
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| − | | Wis
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| − | | [[Turn undead]]
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| − | |-
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| − | | Monk
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| − | | 8#
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| − | | -2#
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| − | | 2#
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| − | | 20#
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| − | | Wis
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| − | | [[Restore ability]]
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| − | |-
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| − | | Priest
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| − | | 3#
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| − | | -2#
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| − | | 2#
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| − | | 10#
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| − | | Wis
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| − | | [[Remove curse]]
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| − | |-
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| − | | Ranger
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| − | | 9#
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| − | | 2#
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| − | | 1#
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| − | | 10#
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| − | | Int
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| − | | [[Invisibility]]
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| − | |-
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| − | | Rogue
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| − | | 8#
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| − | | 0#
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| − | | 1#
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| − | | 9#
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| − | | Int
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| − | | [[Detect treasure]]
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| − | |-
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| − | | Samurai
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| − | | 10#
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| − | | 0#
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| − | | 0#
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| − | | 8#
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| − | | Int
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| − | | [[Clairvoyance]]
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| − | |-
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| − | | Tourist
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| − | | 5#
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| − | | 1#
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| − | | 2#
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| − | | 10#
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| − | | Int
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| − | | [[Charm monster]]
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| − | |-
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| − | | Valkyrie
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| − | | 10#
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| − | | -2#
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| − | | 0#
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| − | | 9#
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| − | | Wis
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| − | | [[Cone of cold]]
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| − | |-
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| − | | Wizard
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| − | | 1#
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| − | | 0#
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| − | | 3#
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| − | | 10#
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| − | | Int
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| − | | [[Magic missile]]
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| − | |}
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| − | | |
| − | | |
| − | Next, calculate a base chance of success, which is 5.5 times your
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| − | intelligence or wisdom STAT, depending on your class. This chance is
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| − | modified by the following factors:
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| − | * SKILL level (Unskilled = 0, Basic = 1, Skilled = 2, Expert = 3)
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| − | * spell level (LVL)
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| − | * experience level (XL)
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| − | according to this formula:
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| − | difficulty = (LVL * 4) - (SKILL * 6) - (XL/3) - 5
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| − | | |
| − | If this is positive, your chance is reduced according to another formula:
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| − | chance = base chance - square root of ((900 * difficulty) + 2000)
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| − | If it is negative, it will be increased with diminishing returns: the
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| − | absolute value is multiplied by (15/LVL), capped at 20, and added to
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| − | the base chance.
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| − | | |
| − | The resulting chance is clipped to the range of 0% to 120% success. If
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| − | you are wearing a shield larger than a small shield, the chance is then
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| − | reduced to 1/4 its amount (except if it is the special spell for your
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| − | class -- then it is only halved).
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| − | | |
| − | Finally, the chance of success is adjusted by your total penalty using
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| − | the following formula:
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| − | chance = (chance * (20-penalty) / 15) - penalty
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| − | The result is clipped to the range of 0% to 100% success.
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| − | | |
| − | ----
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| − | | |
| − | | |
| − | | |
| − | {{DOD}}
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| − | [[Category:Spellcasting]]
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