I, too, struggled with it all day Monday and went through the same thing as you, Physicsgirl re. the tobogganing. I am beginning to learn to go the Chambers automatically - it can save a lot of time. Like others I started with carp and, with a little prompt from Crofter, ended with card. I still have one or two queries over definitions, despite having finished but think the answers are basically right and have dispatched it.
The Chambers really is a 'must' I won a Chambers 10th Edition a few weeks back and it's worth its (very heavy) weight in gold.