🧠 Symmetry Wannabe (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. Nf3 Nf6 2. b3 b6 3. Bb2 Bb7 4. c4 c5 5. Nc3 Nc6 6. e3 Bxf3 7. Qxf3 Rc8 8. d3 e6 *

And the answer is...
Black's move 6... Bxf3 is illegal because the Bishop is blocked by the Knight on c6.