How to Beat Scholar's Mate (The 4-Move Checkmate)
Every new player loses to it once: queen to h5, bishop to c4, queen takes f7 - checkmate in four moves. The good news: Scholar's Mate is not just stoppable, it is BAD for the attacker against correct defense. Here is the refutation you'll use forever.
How the attack works
After 1.e4 e5, White plays 2.Qh5 (or 2.Bc4 first). The queen and bishop both aim at f7 - the one square defended only by your king. If Black plays natural-looking moves like 2...Nc6 3.Bc4 Nf6??, then 4.Qxf7# ends the game. The attack works exclusively against players who don't count the attackers on f7.
The two-move refutation
Against 2.Qh5, play 2...Nc6 first - defending e5, developing, and NOT weakening anything. If White continues 3.Bc4 (renewing the mate threat), now 3...g6! hits the queen and shuts the h5-f7 diagonal for good. The queen must retreat or wobble to f3, when 4...Nf6 covers everything again and Black simply finishes development.
Count the ledger after the smoke clears: Black has developed knights and a fianchetto bishop with tempo - every attack on the wandering queen was a free developing move. White has moved the queen two or three times and developed one piece. The attacker's rush becomes the defender's lead.
The principle underneath
Scholar's Mate is the loudest example of a universal rule: early queen raids fail against calm counting. Ask two questions every move - 'what does that move threaten?' and 'how many attackers versus defenders on the target square?' Answer them honestly and no four-move trick will ever touch you again. Punishing the raid, rather than merely surviving it, is where your rating starts climbing.