3E is great but it doesn't go far enough. Find the rules for this skills-based variant at www.global-diplomacy.com (don’t forget the dash). Event descriptions are also available at this website.
A competitive event with two groups playing simultaneously on separate tables. For the amusement of the citizens, two groups of prisoners fight each other for freedom or death.
Dungeons and Dragons/Guidebooks. A Noble is Missing from Waterdeep
Description:
A challenge mystery that takes place in the City of Splendors. A party of six has been hired to investigate the disappearance of a noble family’s son. Bring your wits and guile for action, adventure, and intrigue.