ECO	Opening Name		YOUR GAMES!!
E50	Nimzo-Indian defense		1.d4-Nf6; 2.c4-e6;
	(4.e3-O-O; 5.Nf3, without		3.Nc3-Bb4; 4.e3-O-O;
	...d5)		5.Nf3
			Eco E50
E51	Nimzo-Indian defense		1.d4-Nf6; 2.c4-e6;
	(4.e3-O-O; 5.Nf3-d5)		3.Nc3-Bb4; 4.e3-O-O;
			5.Nf3-d5
	1) Taimanov variation		6.Bd3-Nc6; 7.O-O-dxc4
	2) Rest in E51		Rest
E52	Nimzo-Indian defense		1.d4-Nf6; 2.c4-e6;
	(4.e3, main line (with		3.Nc3-Bb4; 4.e3-O-O;
	6...b6))		5.Nf3-d5; 6.Bd3-b6
			Eco E52
E53	Nimzo-Indian defense		1.d4-Nf6; 2.c4-e6;
	(4.e3, main line (with		3.Nc3-Bb4; 4.e3-O-O;
	6...c5))		5.Nf3-d5; 6.Bd3-c5
	1) Keres variation		7.O-O-b6
	2) Gligoric system (with 7...Nbd7)		7.O-O-Nbd7
	3) Rest in E53		Rest
E54	Nimzo-Indian defense		1.d4-Nf6; 2.c4-e6;
	(4.e3, main line (with		3.Nc3-Bb4; 4.e3-O-O;
	7...dxc4))		5.Nf3-d5; 6.Bd3-c5;
			7.O-O-dxc4; 8.Bxc4
	1) Smyslov variation		8...Qe7
	2) Rest in E54		Rest
E55	Nimzo-Indian defense:		1.d4-Nf6; 2.c4-e6;
	(4.e3) Gligoric system,		3.Nc3-Bb4; 4.e3-O-O;
	Bronstein variation		5.Nf3-d5; 6.Bd3-c5;
			7.O-O-dxc4; 8.Bxc4-Nbd7
			Eco E55
E56	Nimzo-Indian defense:		1.d4-Nf6; 2.c4-e6;
	(4.e3) main line (with		3.Nc3-Bb4; 4.e3-O-O;
	7...Nc6)		5.Nf3-d5; 6.Bd3-c5;
			7.O-O-Nc6
			Eco E56
E57	Nimzo-Indian defense:		1.d4-Nf6; 2.c4-e6;
	(4.e3) main line (with		3.Nc3-Bb4; 4.e3-O-O;
	8...dxc4, 9...cxd4)		5.Nf3-d5; 6.Bd3-c5;
			7.O-O-Nc6; 8.a3-dxc4;
			9.Bxc4-cxd4
			Eco E57
E58	Nimzo-Indian defense:		1.d4-Nf6; 2.c4-e6;
	(4.e3) main line (with		3.Nc3-Bb4; 4.e3-O-O;
	8...Bxc3)		5.Nf3-d5; 6.Bd3-c5;
			7.O-O-Nc6; 8.a3-Bxc3;
			9.bxc3
			Eco E58
E59	Nimzo-Indian defense:		1.d4-Nf6; 2.c4-e6;
	(4.e3) main line		3.Nc3-Bb4; 4.e3-O-O;
			5.Nf3-d5; 6.Bd3-c5;
			7.O-O-Nc6; 8.a3-Bxc3;
			9.bxc3-dxc4; 10.Bxc4
			Eco E59

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