1.   All this proved a formidable challenge to our sweeper, a delightful Rajasthani lady named Murti.

2.   Chess posed a formidable challenge for computer scientists.

3.   The formidable challenge for progressive bishops and theologians who dominated the Second Vatican Council was to formulate a compelling alternative.

4.   Identifying the true, the beautiful, and the good - and which of these truths, beauties, or goods are worth knowing - constitutes a formidable challenge.

5.   At their most fully developed business information systems provide a formidable challenge to the creativity of archivists and historians alike.

6.   Now Middlesbrough face the formidable challenge of Manchester United in the two-leg semi-final, a rich reward for the only League club firing on three fronts.

7.   DARLINGTON face a formidable challenge against leaders Stoke City at Victoria Ground tonight.

8.   Although the inclusion of Dowd could remedy that problem as well as give a bipartisan tone to the probe, the experts warned that Danforth faces formidable challenges ahead.

9.   Analysts said that even with that skill set, though, Nugent faces a formidable challenge in turning Revlon around.