So WHY is a knight on the rim dull and dim?!

We've all heard this phrase while playing chess. But why? First let's start with a knight in the center.

So where can it go? A whole 8 spaces!

What about the next move?

Geez that covers like the whole board!

But what if you knight is on the edge? 

A measly 4 spaces.

Look at this. He stucc.

Conclusion: Don't be a dumb dummy and put you knight knighty on the edge edgy.