🧠 Hop the Fence (Illegal Move Exercise)

Illegal Move Exercise: The audio will lead you through a series of moves from the beginning of a game. Somewhere in there, a player will make an illegal move but the game will continue anyway. Find the illegal move.

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PGN for today's exercise:

1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qf4 Nf6 5. Nf3 Be7 *

And the answer is...
White's move 4. Qf4 is illegal, because the e4-pawn is in the way.