Spanish (Ruy Lopez) Opening, French Defense, King's Gambit and Petrov in Ecochess!

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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
Tactical
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Eco Code C00-C99

ECO	Opening Name	MOVES (Algebraic System)

C00-C09	French defense	1.e4-e6
	Others (C00)	2.Others
	2.d4-d5 variation (C01-C09)	2.d4-d5

C10-C19	French defense: Paulsen	1.e4-e6; 2.d4-d5; 3.Nc3
	variation
	Others (C10)	3...Others
	3...Nf6 variation (C11-C14)	3...Nf6
	Winawer variation (C15-C19)	3...Bb4

C20-C29	King's pawn game	1.e4-e5
	Others (C20)	2.Others
	Centre game (C21-C22)	2.d4
	Bishop's opening (C22-C23)	2.Bc4
	Vienna game (C24-C29)	2.Nc3

C30-C39	King's gambit	1.e4-e5; 2.f4
	Others (C30)	2...Others
	Declined, Falkbeer (C31-C32)	2...d5
	Accepted (C33-C39)	2...exf4

C40-C49	King's knight opening	1.e4-e5; 2.Nf3
	Others (C40)	2...Others
	Philidor's defense (C41)	2...d6
	Petrov's defense (C42-C43)	2...Nf6
	2...Nc6 variation (C44-C49)	2...Nc6

C50-C59	King's pawn game	1.e4-e5; 2.Nf3-Nc6; 3.Bc4
	Others (C50)	3...Others
	3...Bc5 variation (C51-C54)	3...Bc5
	Two knights defense (C55-C59)	3...Nf6

C60-C69	Ruy Lopez (Spanish)	1.e4-e5; 2.Nf3-Nc6; 3.Bb5
	Others (C60)	3...Others
	Bird's defense (C61)	3...Nd4
	Old Steinitz defense (C62)	3...d6
	Schliemann defense (C63)	3...f5
	Classical (Cordel) defense (C64)	3...Bc5
	Berlin defense (C65-C67)	3...Nf6
	Exchange variation (C68-C69)	3...a6; 4.Bxc6

C70-C79	Ruy Lopez (Spanish)	1.e4-e5; 2.Nf3-Nc6; 3.Bb5-a6;
		4.Ba4
	Others (C70)	4...Others
	Modern Steinitz defense (C71-C76)	4...d6
	Morphy defense (C77-C79)	4...Nf6

C80-C89	Ruy Lopez (Spanish)	1.e4-e5; 2.Nf3-Nc6; 3.Bb5-a6;
		5.Ba4-Nf6; 6.0-0
	Open (Tarrasch) (C80-C83)	6...Ne4
	Closed defense (C84-C89)	6...Be7

C90-C99	Ruy Lopez: (Spanish)	1.e4-e5; 2.Nf3-Nc6; 3.Bb5-a6;
	Closed defense	4.Ba4-Nf6; 5.O-O-Be7; 6.Re1-b5;
	(with 8...d6)	7.Bb3-O-O; 8.c3-d6
	Others (C90)	9.Others
	9.d4 variation (C91)	9.d4
	9.h3 variation (C92-C99)	9.h3