‘Game designer’ was not a job description used by the navy at the time, but this was the nature of the role given to Roberts by Britain’s prime minister, Winston Churchill. He was to create a game that would enable the British to understand why they were losing so many ships to German U-boat attacks. Teamed with a clutch of bright, astute young naval women known as Wrens, many of whom were barely out of school, Roberts had, in the months that followed, restaged countless ocean battles using his game. Through play he had developed anti-U-boat tactics that, once proven, had been taught to
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