Alan Turing.The questions begin with a relatively straightforward crossword-style puzzle that starts by asking where GCHQ’s predecessor agency, where Turing worked, was based during the second world war.
A two-word answer, nine letters then four, is required.The spy agency, which believes setting puzzles gives the public an insight into its surveillance work, said it thought the multi-part “Turing challenge” would take an experienced puzzler seven hours to complete.Colin, described by the agency as its “chief puzzler,” said GCHQ’s riddles were generated by “a mix of minds from across our missions” in honour of Turing, who he said had inspired many recruits to join.GCHQ chiefs also took the opportunity to apologise again for the postwar.