Actually it isn't common, because everyone knows it. But it's very famous.
Quick Checkmates Part 01: The Scholar's Mate Pt 1

There are many people who don't know about it and we have some less skilled members and this is to help them. I apologize.
There are many people who don't know about it and we have some less skilled members and this is to help them. I apologize.
Scholar's Mate
The Scholar's mate is one of the most common checkmates in chess, and if the opponent does not know how to counter it, extremely effective. There are dozens of outcomes of the Scholar's Mate and many variables to consider, but first, what does a Scholar's Mate look like in the first place?
That is the most common example of the Scholar's Mate. Note how the Queen is protected by the Bishop with no piece to challenge it; that's one reason that makes this move so effective. Another reason is that it may be hard to see it coming and you may not be expecting such a simple four move checkmate. So, if this move is so effective, how would one challenge it? How is such an effective move countered? Well, as you will soon learn, it is just as effective an d simple to counter. In a sense, it is a Scholar's Situation for both sides.
Countering the Scholar's Mate With a Knight
Since there are many ways to block the Scholar's mate, we should go over the lot of them. First, we will start with countering the move with the knight:
If you see in that diagram, moving the King-side Knight before the Queen has a chance to move over towards that area, it blocks both ways the queen would have a strong attack on it. Both from the column and the diagonal. That is the most common block. That one is good, but there is one even better knight block that we will discuss. Here it is:
If you look carefully, placing the knight on its move to the edge of the board, it made it so the queen would get captured when it went on what would've been the winning square. What makes that block so effective is that it is easily looked over and so it is good for fooling your opponent. In the next lesson, we will find out ways to block it with the Queen, and even a Pawn.