Under the new rules, which take effect in 1990, the tracks can run whenever they want, even if that means head-to-head competition.

If not, there will be no chance to assess, in head-to-head competition, whether the private sector or the government program performs better.

The loser of the head-to-head competition was then eliminated from the show.

It also includes a system to challenge other players in head-to-head competitions.

Along with the regular contests, members of Worth1000 challenge each other in head-to-head competitions too.

In most cases the rules preclude foreign and local films from head-to-head competition.

The main problem is the lack of head-to-head competition among the best players.

The first was usually a head-to-head competition played under a 30 or 60-second time limit.

Teams from 245 commercial buildings are in a head-to-head competition to see who can reduce their energy use the most!

The head-to-head competition occurred in front of a live studio audience.