Chess Queen trap in French Rubinstein, Fort Knox variation

In Chess, there is no such thing as a bullet proof opening. To demonstrate this, we look at a Queen trap in the rock solid French Fort Knox line; a favourite Club players.

This video explains the basics of, and a trapping line in, the French Rubinstein (1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4) Fort Knox variation, where Black plays 5. …Bd7 intending Bc6. The Queen trap occurs if Black plays carelessly, without regard for with Nf6 before Nd7 and/or Be7.