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.

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PGN for today's exercise:

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 Bd7 7. Be2 Bb5 8. 0-0 Nge7 9. Be3 Nf5 10. Nbd2 Nxe3 11. fxe3 cxd4 12. exd4 *

And the answer is...
Black's move 7... Bb5 is illegal because the Bishop is blocked by the black Knight on c6.