The void grows with each black block it touches and must avoid increasingly challenging waves of white blocks.

We now we find ourselves in increasingly challenging times.

After half a dozen increasingly challenging runs, we flew down a long, open slope to have a picnic lunch by our waiting helicopter.

Each mystery (there are two on every disk) is presented at six increasingly challenging levels, each with a different solution.

But identifying what counts as a human being may be an increasingly challenging task.

The prime minister is at the lectern, struggling to field a series of increasingly challenging questions from the leader of the opposition.

The entire battle group had trained the previous six months in preparation for this deployment through a series of increasingly challenging exercises and operations.

In addition, "all students need instructional support so they can expand their competence across a greater variety of increasingly challenging texts."

The design of robust and reliable networks and network services has become an increasingly challenging task in today's Internet world.

Food companies are increasingly challenging restaurants in the battle for consumer's food dollar.