I believe you are right JoergWausW. And right to rank it low. I do the same with others.

One of the key's to this series is working out the word before you do it at all. Once you've done a few it should be quite possible to work out all the rest without completing any of them :o)

I've made a few more difficult, like this one, than others so that even if you do know the result finding the correct squares is still something of a challenge.