Steve Davis on Twitter: "#AskTheRef @janverhaas Hi Jan. After a foul and 1 red left, the rule book says this is not a free ball. Curved part of cushion nightmare! https://t.co/GIihatF70v" /
Snooker Rules, How to Play | Tips and Techniques
Snooker Rules
World 8 Ball Rules
Glossary of cue sports terms - Wikiwand
rules - Free ball off a foul at the break - Sports Stack Exchange