Alexander Alekhine helped popularise 1.e4 Nf6 through his games at Budapest in 1921. He did not invent the move, but his use brought attention to its provocative logic. Black invites White to gain space by attacking the knight, then looks for ways to challenge the pawns that have advanced. The opening's name records the influence of its advocate rather than the first appearance of the position.
After 2.e5 Nd5 3.d4 d6, the strategic bargain is visible. White has central space and has gained time against a knight; Black hopes the advanced pawns will become targets. Neither side wins that argument merely by following the opening idea. White must support the centre, while Black must create pressure before the space advantage becomes overwhelming.
This is why repeated knight moves require concrete justification. A general rule to develop quickly still matters, and Black cannot spend unlimited time retreating. The breaks and exchanges around d6 and e5 must be coordinated with development. White can choose restrained development or more ambitious pawn expansion, and the difference changes Black's task.
Begin with the Modern main line and explain how White supports the centre while bringing pieces out. Later, compare the Four Pawns Attack to see a more expansive version of the same debate. The memorable story of a chased knight should lead to a useful question at the board: have the pawns gained lasting strength, or have they advanced beyond reliable support?
Try this at the board
After ...d6, identify the pawn Black is challenging and the pieces White still needs to develop.