Hitting probabilities for zap_hit()-based spells, wands, and breath attacks
Hit Probability
Target AC
-32
-28
-24
-20
-16
-12
-8
-4
0
4
8
12
16
20
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
AC -12: Master Kaen wearing +0 robe
AC -8: Wizard of Yendor
AC -5: Famine, Death, Pestilence
AC 2: Medusa, Lord Surtur
spell_bonus
14 (Expert, Dex 25)
9 (Basic, Dex 23; Skilled, Dex 21; ...)
4 (Basic, Dex 18; Skilled, Dex 16; ...)
0 (wands; breath attacks; Basic, Dex 8 to 14; ...)
-7 (Unskilled, Dex 3)