Bletchley Park recruiters share puzzles they used as tests

Daily Mail - Science & tech 

The importance of the code-breaking operations at Bletchley Park cannot be underestimated. They produced vital intelligence that played a huge part in swinging the war in the Allies' favour. As Winston Churchill said at the time, the Bletchley staff were'the geese that laid the golden eggs and never cackled'. When scouring the land for the government's secret Code and Cypher School, which obtained signals intelligence by breaking high-level encrypted enemy communications, the Bletchley Park recruiters left no stone unturned Intelligence from Bletchley played a vital part in the defeat of the U-boats in the six-year Battle of the Atlantic, British naval triumphs in the Battle of Cape Matapan in 1941 and the Battle of North Cape off the coast of Norway in 1943. By 1944 British and American commanders knew the location of 58 out of 60 German divisions across the Western Front.