Anti-pirc
As far as I know, there isn't an article about any Anti-Pirc lines. So I'm glad to show this interesting one (it is called the delayed spike).... I used to play the Pirc a lot (as my name indicates), so I know this is a dangerous line! ...
cross-check!
Here you can see a bizar phenomenon called cross-check! I found this position in an old chessbook and I want to show this beatiful diagram. Try to find the moves that 'll lead to the checkmate....