As for the club's activities in Jung's lifetime and since, they have been on occasion intellectually challenging, but never charismatic.

It's intellectually challenging because all the strategy involved requires you to think four or five moves ahead.

Professional performances are engaged in creative and intellectually challenging work.

Few violinists play all six on one occasion, over two hours of the most technically and intellectually challenging music ever written for the violin.

"They are serious films that are intellectually challenging," she said.

Fred Newton Scott saw rhetoric as an intellectually challenging subject.

It's sophisticated, intellectually challenging, even (God help me) classic.

A. In college was the first time that I ever studied religion on a sophisticated, intellectually challenging level.

Chess is an intellectually challenging game requiring analytical skill in strategic moves.

That work was intellectually challenging, but helping children at a distance through lab work left a void, she said.