This story appears in the June 14 issue of ESPN The Magazine.
The legend begins with a piece of paper and some tape.
Playing online poker against 179 challengers three years ago, 18-year-old Annette Obrestad sat at her computer in Sandnes, Norway. She was winning and she was bored, so she decided to test her limits. She taped that piece of paper on the screen, covering her view of her cards. How long, she wondered, could she survive playing Texas hold 'em knowing only her opponents' chip positions and betting patterns? Hours later, after she'd won the tourney, she knew the answer: All day.