Some of it is easy, some of it you'll likely have seen before, some of it is a bit harder. (I found it so, anyway, scoring a little less than I was comfortable with.)
At the end you give your Elo rating, if you have one, and a few other details - they explain briefly the purpose of the survey, and you even get the answers to the questions.
So give it a go: it's a long weekend and I'm sure you have half an hour spare to make a small contribution to Science.
And no closing the browser window prematurely when you think you've got too many wrong!
(Thanks also to Dr Chris Brooke, Oliver Rivers and Dr Vanda Wilcox.)