How did the game of chess go badly wrong for Anglo-Saxon nobleman Eadric Steona in 1017?
Answer: Eadric had just beaten English King Cnut at a game, and when Cnut challenged him to change the rules in his favour, Eadric refused. Already distrustful of Eadric, Cnut consequently had him executed for his insolence.
Source: Before the Conquest by William Henry Davenport Adams