C66	Ruy Lopez
	Berlin Defence, 4.O-O, d6
	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6
C66	Ruy Lopez
	Berlin Defence, hedgehog Variation
	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7
C66	Ruy Lopez
	Berlin Defence, Tarrasch trap
	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Re1 O-O
C66	Ruy Lopez
	Closed Berlin Defence, Bernstein Variation
	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Bg5
C66	Ruy Lopez
	Closed Berlin Defence, Showalter Variation
	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Bxc6
C66	Ruy Lopez
	Closed Berlin Defence, Wolf Variation
	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 exd4
C66	Ruy Lopez
	Closed Berlin Defence, Chigorin Variation
	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Nd7