In case you've missed it, UK-Halsey Sails has put up a new rules quiz (24) on there site. Click on the picture to go there:
If you've been a regular visitor of this blog and followed the discussions, you should be able to answer this one straight away.
For those of you visiting the UK-Halsey Sailmakers site for the first time, have a look at all the previous quizzes. The animations are very good and the cases interesting.