French ECO Codes

C00: French Defence, unusual White second moves: 1.e4 e6

C01: French Defence, Exchange Variation: 1.e4 e6 2.d4 d5 3.exd5 exd5

C02: French Defence, Advance Variation: 1.e4 e6 2.d4 d5 3.e5

C03: French Defence, Tarrasch Variation and unusual Black third moves: 1.e4 e6 2.d4 d5 3.Nd2 C04: French Defence, Tarrasch Variation with 3...Nc6: 1.e4 e6 2.d4 d5 3.Nd2 Nc6

C05: French Defence, Tarrasch Variation 3...Nf6 4.e5 Nfd7, unusual White fifth moves: 1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7

C06: French Defence, Tarrasch Variation 3...Nf6 4.e5 Nfd7 5.Bd3 main line: 1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3

C07: French Defence, Tarrasch Variation 3...c5, various White fourth moves: 1.e4 e6 2.d4 d5 3.Nd2 c5

C08: French Defence, Tarrasch Variation 3...c5 4.exd5 exd5 sidelines: 1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5

C09: French Defence, Tarrasch Variation 3...c5 main line: 1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Ngf3 Nc6

C10: French Defence, 3.Nc3 sidelines: 1.e4 e6 2.d4 d5 3.Nc3

C10: French Defence, Rubinstein Variation: 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4

C11: French Defence, Steinitz Variation: 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5

C12: French Defence, MacCutcheon Variation: 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4

C13: French Defence, Burn Variation: 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4

C14: French Defence, Classical main line: 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5

C15: French Defence, Winawer Variation sidelines: 1.e4 e6 2.d4 d5 3.Nc3 Bb4

C16: French Defence, Winawer Variation without ...c5: 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5

C17: French Defence, Winawer Variation 4...c5 sidelines: 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5

C18: French Defence, Winawer Variation with 6...Qc7: 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Qc7

C19: French Defence, Winawer Variation main line 6...Ne7 7.Nf3 Qc7: 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Nf3 Qc7

(ECO) code. In 1966, Chess Informant categorized the chess openings into five broad areas ("A" through "E"), with each of those broken down into one hundred subcategories ("00" through "99"). The openings were published in five volumes of ECO, with volumes labeled "A" through "E". This is a list of chess openings by the ECO classification.