http://pgexercises.com/questions/basic/where3.html
The query I used was "select * from cd.facilities where name ~ 'Tennis';" which got me the tick, but the page didn't detect that I hadn't used LIKE and the feedback was therefore wrong. You might want to think a little more about different solutions to the exercises.
Other than that it's slick and impressive so far, thanks. I shall be sending the URL onwards.