Talking about THAC0 not being very good.... I went into a dungeon as Cleric, dualled from Figher, level 7. All my team got killed and 'I' was left fighting the last living enemy, who was a blind cleric, also with poor thaco by the way he was fighting. We had both run out of healing spells, and we were whacking away at each other and both missing most of the time... It was hilarious!
F.