A gaming machine 10 has a display 14 and a game controller arranged to control images displayed on the display 14. The game controller is arranged to play a wagering game 16 wherein at least one random event is caused to be displayed on the display 14 and, if a predefined winning event occurs, the machine...http://www.google.co.uk/patents/US6585264?utm_source=gb-gplus-sharePatent US6585264 - Gaming machine with chess game feature