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Combat Tables

These tables list the attack probabilities for all monsters and characters and the saving throw values used by monsters and normal humans.

PC and NPC Saving Throws

PCs and classed NPCs use the saving throw tables for their character class, listed in the class description.

Attack Matrix
  Attack Roll to Hit AC
THAC0 –3 –2 –1
0
1
2
3
4
5
6
7
8
9
20 [–1]
20
20
20
20
19
18
17
16
15
14
13
12
11
19 [0]
20
20
20
19
18
17
16
15
14
13
12
11
10
18 [+1]
20
20
19
18
17
16
15
14
13
12
11
10
9
17 [+2]
20
19
18
17
16
15
14
13
12
11
10
9
8
16 [+3]
19
18
17
16
15
14
13
12
11
10
9
8
7
15 [+4]
18
17
16
15
14
13
12
11
10
9
8
7
6
14 [+5]
17
16
15
14
13
12
11
10
9
8
7
6
5
13 [+6]
16
15
14
13
12
11
10
9
8
7
6
5
4
12 [+7]
15
14
13
12
11
10
9
8
7
6
5
4
3
11 [+8]
14
13
12
11
10
9
8
7
6
5
4
3
2
10 [+9]
13
12
11
10
9
8
7
6
5
4
3
2
2
9 [+10]
12
11
10
9
8
7
6
5
4
3
2
2
2
8 [+11]
11
10
9
8
7
6
5
4
3
2
2
2
2
7 [+12]
10
9
8
7
6
5
4
3
2
2
2
2
2
6 [+13]
9
8
7
6
5
4
3
2
2
2
2
2
2
5 [+14]
8
7
6
5
4
3
2
2
2
2
2
2
2
Monster Saving Throws
Hit Dice Death Wands Paralysis Breath Spells
Normal Human
14
15
16
17
18
1–3
12
13
14
15
16
4–6
10
11
12
13
14
7–9
8
9
10
10
12
10–12
6
7
8
8
10
13–15
4
5
6
5
8
16–18
2
3
4
3
6
19–21
2
2
2
2
4
22 or more
2
2
2
2
2

Example of Making an Attack Roll

A 5th level fighter attacks a monster with AC 4. The attack is resolved as follows:

1. The player rolls 1d20. The roll comes up 14.

2. The fighter has a STR score of 13, meaning they gain a +1 bonus to melee attack rolls. The result of the attack roll is thus 15.

3. The player looks up the result (15) in the attack matrix row for 5th level fighters (THAC0 17 [+2]). This indicates the Armour Class that the attack hits: AC 2.

4. As AC 2 is better than the monster’s Armour Class, the attack hits!

5. Damage is rolled and the result subtracted from the monster’s current hit point total.

Normal Humans (NH)

All humans who are not a member of an adventuring class are classified as normal humans. They are treated as having less than 1 Hit Die and have their own saving throw and attack probabilities.

Attack Rolls Using THAC0 (Optional Rule)

Instead of referring to the attack matrix, attacks may be resolved using THAC0 directly. A THAC0 score denotes the attack roll required to hit AC 0. The attack roll required to hit opponents of other AC scores can be calculated by subtracting the target AC from the THAC0. For example, a character with a THAC0 of 19 could hit an opponent with AC 5 on a roll of 14 or greater (19 – 5 = 14).

Note: Using THAC0 to resolve attack rolls results in very slightly different attack probabilities than when using the traditional approach of referring to the attack matrix.