Chapman said it took him 10 years of practising and experience to win his first world title.
“It’s all about being methodical, learning the courses and being able to putt consistently,” he added.
Chapman, a former fencing coach, said he was “privileged” to represent Great Britain in mini golf tournaments.
Mini golf is a scaled-down version of golf which focuses on putting, while crazy golf features courses with unconventional obstacles – such as moving windmills.
The Crazy Golf World Championships is due to take place at Hastings Adventure Golf from Friday to Sunday.