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*Pathfinder & Starfinder
A historical look at D&D ACs (part 1)
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<blockquote data-quote="MerricB" data-source="post: 5877399" data-attributes="member: 3586"><p>One of the very interesting features of having almost every (fightable) monster in oD&D/AD&D being in the 2-9 range of AC is that it makes all characters relevant in physical combat, something that quickly became <em>not</em> the case when you dropped into the negatives.</p><p></p><p>Speaking in terms of THAC0, first level magic-users and thieves in AD&D had a THAC0 of 21; this translates into a THAC2 of 19 and a THAC5 of 16. For the thief, this doesn't change until the character reaches 5th level, at which point it improves by a massive 2 points (THAC2=17, THAC5=14). At 9th level, the thief's next point of improvement, this improves by 3 (THAC2=14, THAC5=11).</p><p></p><p>Meanwhile, the fighter has been improving by 1/level from a start of THAC0=20, so by 9th level, he's at THAC2=9, THAC5=6.</p><p></p><p>I look at AC5 because it's a pretty standard AC for low-level monsters in the game (and some higher-level ones as well), whilst AC2 is about as high as your regular foes will get. </p><p></p><p>Once you move outside those values - above level 9, and below AC 2 - the mathematics of AD&D combat begins to look a lot more shaky.</p><p></p><p>More soon...</p></blockquote><p></p>
[QUOTE="MerricB, post: 5877399, member: 3586"] One of the very interesting features of having almost every (fightable) monster in oD&D/AD&D being in the 2-9 range of AC is that it makes all characters relevant in physical combat, something that quickly became [i]not[/i] the case when you dropped into the negatives. Speaking in terms of THAC0, first level magic-users and thieves in AD&D had a THAC0 of 21; this translates into a THAC2 of 19 and a THAC5 of 16. For the thief, this doesn't change until the character reaches 5th level, at which point it improves by a massive 2 points (THAC2=17, THAC5=14). At 9th level, the thief's next point of improvement, this improves by 3 (THAC2=14, THAC5=11). Meanwhile, the fighter has been improving by 1/level from a start of THAC0=20, so by 9th level, he's at THAC2=9, THAC5=6. I look at AC5 because it's a pretty standard AC for low-level monsters in the game (and some higher-level ones as well), whilst AC2 is about as high as your regular foes will get. Once you move outside those values - above level 9, and below AC 2 - the mathematics of AD&D combat begins to look a lot more shaky. More soon... [/QUOTE]
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