The last in the series of puzzles from Chns Maslanka and the panel as they attempt to baffle each other with brainteasers based on words, numbers and logic On this week's panel are medical physicist and maze designer Professor Angela Newing , mathematician Professor David Singmaster and chess grandmaster Raymond Keene.
Producers Claire Csonka and Harry Parker. Listeners with puzzles and answers can send them to Puzzle Panel. Room 7058. BBC Broadcasting House. London W1A 1AA. or bye-mail: puzzle.panel@bbc.co.uk