====== Calculating THAC0 ======

| **Field** | Role Play Gaming |
| **Went Obsolete** | early 2000s |
| **Made Obsolete By** | The introduction of 3rd edition of Dungeons and Dragons game |
| **Knowledge Assumed** | Roll a twenty side dice, Role play |
| **When useful** | During fight simulation in Dungeons and Dragons game |

The "Throw to Hit Armor Class 0" value was used to determine how much easy was, for a character, to hit another one. Usually this value was determined by Dungeon Masters, in advance, through "complex" calculations.