If you thought jigsaw puzzles were meant to be relaxing, think again.

Speed puzzling is like a marathon for the mind – intense, demanding, surprisingly exhausting. But does turning it into a sport destroy it as a relaxing pastime?

Was it a false measurement, a full-blown conspiracy or just some mild incompetence?

Party holes, paid partnerships and podcast appearances – it's all part of a concerted effort to attract young people to gambling.