These are examples of ideas that JK Rowling stole from Willy the Wizard for the Goblet of Fire, according to lawyers acting for Adrian Jacobs' estate.
Playing chess on wizard trains, which lawyers allege Rowling took to form the idea of the Hogwarts Express
"These were Pullman-like trains made of see-through platinum, and inside the trains were chess rooms. Willie was handicapped 18. There were Wizard Chess Masters who were virtually unbeatable. Willie had made a daring move. He didn’t want to watch his opponent’s response and his mind wandered at the moment that Angel Sandy had tapped violently on the train window."
A wizards' college, which lawyers allege Rowling took to form the idea of the Hogwarts School of Witchcraft and Wizardry
"Willy had been clever at wizards’ college particularly in ancient wizardry histoire....
"Wizard Cassius had been his companion at the Junior wizards’ advanced students course in Palermo, and Willy had saved Cassius’ life."
A wizards' contest, which lawyers allege Rowling took to form the idea of the Triwizarding Tournament
"A voice began to boom from the walls of the great hall. 'We are here today for me to inaugurate the year of the wizards’ contests. Each of you will be given details of the competitions, prizes and penalties. Au revoir, tout a’ l’heure, etc.’. Duke Louis Dix-Sept jumped onto the back of one of his panthers and Goboldyquick he disappeared, carriage and all."