🧠🧠 Ortolan (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. f4 d5 2. Nf3 c5 3. g3 Nc6 4. Bg2 g6 5. O-O Bg7 6. d3 Nf6 7. Nbd2 O-O 8. c4 d4 9. Ne5 Nxe5 10. fxe5 Ng4 11. Nf3 Nxe5 12. Nxe5 Bxe5 13. Qf3 Be6 14. Bf4 Bxf4 15. Qxf4 Qd6 *

And the answer is...
White's move 13. Qf3 is illegal because the Queen is blocked by the pawn on e2.