I'd like to get clarification on just what it takes to trap a model. In the past I've played games with people where if you could move your model 1" away from base contact in any direction (ie sideways) that he isn't trapped. Lately, from looking at the diagrams and wording in the new rulebook, we've been playing 1" in a straight line away from the attacking model, and playing it very strictly.

It's hard to describe without a picture, but an easy way to answer it might be to answer this:

Imagine a goblin attacking a dwarf on one of the new walkways, which are two bases wide. Both models have their back to the edge, meaning if they step backward they fall off. Is it possible for a single attacking model to trap a single defending model, or can the defender move 1" away sideways or at an angle? How much "fudge" should there be when determining "one inch directly away from the attacker"?

Thanks for your gaming wisdom.