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Encyclopedia of Chess Openings

Eco Code

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• Openings
  • A00-A99
    • A00-A09
    • A10-A19
    • A20-A29
    • A30-A39
    • A40-A49
    • A50-A59
    • A60-A69
    • A70-A79
    • A80-A89
    • A90-A99
  • B00-B99
    • B00-B09
    • B10-B19
    • B20-B29
    • B30-B39
    • B40-B49
    • B50-B59
    • B60-B69
    • B70-B79
    • B80-B89
    • B90-B99
  • C00-C99
    • C00-C09
    • C10-C19
    • C20-C29
    • C30-C39
    • C40-C49
    • C50-C59
    • C60-C69
    • C70-C79
    • C80-C89
    • C90-C99
  • D00-D99
    • D00-D09
    • D10-D19
    • D20-D29
    • D30-D39
    • D40-D49
    • D50-D59
    • D60-D69
    • D70-D79
    • D80-D89
    • D90-D99
  • E00-E99
    • E00-E09
    • E10-E19
    • E20-E29
    • E30-E39
    • E40-E49
    • E50-E59
    • E60-E69
    • E70-E79
    • E80-E89
    • E90-E99
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ECO	Opening Name		DOWNLOAD!
A30	English opening:	A30	1.c4-c5
	symmetrical variation
	1) Hedgehog system		2.Nf3-Nf6; 3.g3-b6; 4.Bg2-Bb7;
			5.O-O-e6; 6.Nc3-Be7
	2) Rest in A30		Rest
A31	English opening:	A31	1.c4-c5; 2.Nf3-Nf6; 3.d4
	symmetrical variation,
	Benoni formation
			Eco A31
A32	English opening:	A32	1.c4-c5; 2.Nf3-Nf6;
	symmetrical variation		3.d4-cxd4;  4.Nxd4-e6
			Eco A32
A33	English opening:	A33	1.c4-c5; 2.Nf3-Nf6;
	symmetrical variation		3.d4-cxd4; 4.Nxd4-e6;
			5.Nc3-Nc6
	1) Geller variation		6.g3-Qb6
	2) Rest in A33		Rest
A34	English opening:	A34	1.c4-c5; 2.Nc3
	symmetrical variation
	1) Three knights system		2...Nf6; 3.Nf3-d5; 4.cxd5-Nxd5
	2) With 3.g3		2...Nf6-3.g3
	3) Rest in A34		Rest
A35	English opening:	A35	1.c4-c5; 2.Nc3-Nc6
	symmetrical variation
	1) Four knights system		3.Nf3-Nf6
	2) Rest in A35		Rest
A36	English opening:	A36	1.c4-c5; 2.Nc3-Nc6; 3.g3
	symmetrical variation
	1) Ultra-symmetrical variation		3.g3-g6; 4.Bg2-Bg7
	2) Rest in A36		Rest
A37	English opening:	A37	1.c4-c5; 2.Nc3-Nc6;
	symmetrical variation		3.g3-g6;  4.Bg2-Bg7; 5.Nf3
	1) Botvinnik system reversed		5...e5
	2) Rest in A37		Rest
A38	English opening:	A38	1.c4-c5; 2.Nc3-Nc6;
	symmetrical variation		3.g3-g6; 4.Bg2-Bg7;
			5.Nf3-Nf6
	1) Main line with 7.d3		6.O-O O-O; 7.d3
	2) Main line with 7.b3		6.O-O O-O; 7.b3
	3) Rest in A38		Rest
A39	English opening:	A39	1.c4-c5; 2.Nc3-Nc6;
	symmetrical variation		3.g3-g6; 4.Bg2 Bg7;
			5.Nf3-Nf6; 6.O-O O-O; 7.d4
			Eco A39

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