Barry R. Clarke is a British puzzle designer born in Llanwrtyd Wells, Wales. In 1984, he obtained a Master of Science degree with his thesis in theoretical physics from the University of Hull and published papers on perturbation methods in quantum mechanics. He has written and directed several award-winning short films and his comedy sketches have appeared on both the BBC and ITV. Since 1989, he has written a regular puzzle column for the Daily Telegraph, his puzzle work has been featured on BBC TV Mindgames, and he has published several books of original puzzles. His enigmas have also appeared in the Sunday Telegraph, the Sunday Times, New Scientist and Reader's Digest.