text: This king made a politically-expedient pilgrimage to Rome to attend the coronation of Conrad II.
full_question: This king made a politically-expedient pilgrimage to Rome to attend the coronation of Conrad II. This man used a dispute over a chess game as a pretext to kill his rebellious brother-in-law Ulf. This king legendarily set his throne up by a seashore and fruitlessly commanded the tides not to wet his robes to prove he had less power than God. This man's first wife Aelfgifu proved to be an unbearably autocratic ruler of (*) Norway. After winning the Battle of Assandun against Edmund Ironside, this king married Aethelred the Unready's widow Emma of Normandy, and soon ruled all of England. This king's son had a name prefixing his with "Hartha." For 10 points, name this son of Sweyn Forkbeard, a powerful king who ruled both Denmark and England from 1018 to 1035.
first_sentence: This king made a politically-expedient pilgrimage to Rome to attend the coronation of Conrad II.
raw_answer: Canute the Great [or Cnut; or Knutr inn riki