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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:
e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. h3 Ne7 6. g4 Bd7 7. Bg2 c5 8. c3 Nbc6*
And the answer is...
Black's move 6... Bd7 is illegal because the e6 pawn blocks the bishop from passing back along that diagonal.