Episode Details

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.

To learn more about Don't Move Until You See It and get the free 5-day Conceptualizing Chess Series, head over to https://dontmoveuntilyousee.it/conceptualization

PGN for today's exercise:

1. g3 b6 2. Bg2 Nc6 3. Nf3 Bb7 4. O-O Nf6 5. d3 d5 6. Nbd2 g6 7. Bg5 Bg7 8. Re1 0-0 9. e4 *

And the answer is...
White's move 7. Bg5 is illegal because the Bishop is blocked by the Knight on d2.