The Montimer Trap - Move by Move
In the above diagram, Nc4 is White's best move and it's very dangerous if Black does not know how to follow through (see the video at the end or at http://goo.gl/wPCb0).
In the above diagram, e5 was whites best move but cxb5 is the correct way for Black to continue.
The answer to the above diagram is e5. See the following Puzzle, it's more positional than tactical, but it's White's best continuation to equalize. See if you can find the continuation, but it's not easy.