In this week's lesson, Dennis brings you the sixth installment of his series on the Quick Ruy Lopez. This edition is the second part of his analysis of the sidelines to the Berlin defense. These lines are important for players of the white side of the Ruy as well as Berlin adherents who might be looking to trip their opponent up in sidelines. This is shaping up to be an epic opening video series, so check it out. As always, let us know what you think!