FootBehind the questions
Footbillion data sources and credits
Historical records provide the facts. Footbillion writes the clues, adds answer aliases and decides the order of fees.
Fjelstul World Cup Database
Source: Joshua C. Fjelstul, Ph.D., The Fjelstul World Cup Database. © 2023 Joshua C. Fjelstul, Ph.D. Licensed under Creative Commons Attribution-ShareAlike 4.0.
Footbillion filters and groups records by tournament, team and stage, excludes own goals from player scoring clues, and transforms the records into English and Spanish prompts and ranked answer lists. The derived World Cup question bank is available under the same CC BY-SA 4.0 license.
OpenFootball
Sources: OpenFootball Premier League results and OpenFootball Champions League results. The sources are public-domain data; the derived club question bank is released under CC0 1.0.
Other questions
Earlier and specialist questions use primary competition records, including FIFA, the Premier League and UEFA. Footbillion is an independent trivia site and is not affiliated with these organizations or with Krillion.