The Big 3

The Big 3 or TB3 is a phrase often used to describe the 3 most commonly-played maps in each game mode, mainly for 4on4.

1on1/2on2
In 1on1 and 2on2 these maps are dm2, dm4 and dm6. In the earlier days this was more common due to reluctance to accept new maps. In modern terminology TB5 has taken over as the base map pool for tournaments.

4on4
In 4on4 TB3 is made up of 2 deathmatch maps - dm2 and dm3 - plus e1m2, a map from the Quake1 single player campaign.

TB3 dominance
Debate long raged in the QW scene about whether it's better to stick to the tried and tested TB3 map pool, or whether so-called "Kenya" maps should be played in tournaments.

The 4on4 scene is currently dominated by TB3, with a slim minority of games being played on CMT3 and CMT4.