Opening Exercise: The audio will lead you through a series of moves from the beginning of a game. At a certain point, one player will make a mistake and it’ll be your job to find the move to punish it.
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PGN for today's exercise:
1. d4 e5 2. Bf4 *
And the answer is...
exf4.
This is a very easy puzzle. Treat it more like a warning for London players- don't premove Bf4.