ECO B40
ECO B00–B99 — Semi-Open Games other than the French: 1.e4 answered by the Sicilian, Caro-Kann, Scandinavian, Alekhine, Pirc and more.
18 named opening lines are classified under ECO code B40.
- Sicilian Defense: Alapin Variation, Sherzer Variation — 1.e4 c5 2.Nf3 e6 3.c3 Nf6 4.e5 Nd5 5.d4 Nc6
- Sicilian Defense: Delayed Alapin Variation, with e6 — 1.e4 c5 2.Nf3 e6 3.c3
- Sicilian Defense: Drazic Variation — 1.e4 c5 2.Nf3 e6 3.d4 a6
- Sicilian Defense: French Variation — 1.e4 c5 2.Nf3 e6
- Sicilian Defense: French Variation, Normal — 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6
- Sicilian Defense: French Variation, Open — 1.e4 c5 2.Nf3 e6 3.d4 cxd4
- Sicilian Defense: French Variation, Westerinen Attack — 1.e4 c5 2.Nf3 e6 3.b3
- Sicilian Defense: Gaw-Paw Variation — 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Qb6
- Sicilian Defense: Kan Variation, Wing Attack, Fianchetto Variation — 1.e4 c5 2.Nf3 e6 3.Nc3 a6 4.g3 b5 5.d4 cxd4 6.Nxd4
- Sicilian Defense: Kramnik Variation — 1.e4 c5 2.Nf3 e6 3.c4
- Sicilian Defense: Kveinis Variation — 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Qb6
- Sicilian Defense: Marshall Counterattack — 1.e4 c5 2.Nf3 e6 3.d4 d5
- Sicilian Defense: Paulsen-Basman Defense — 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Bc5
- Sicilian Defense: Pin Variation — 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4
- Sicilian Defense: Pin Variation, Jaffe Variation — 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.Bd3 e5
- Sicilian Defense: Pin Variation, Koch Variation — 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.e5
- Sicilian Defense: Smith-Morra Gambit Deferred — 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.c3
- Sicilian Defense: Wing Gambit Deferred — 1.e4 c5 2.Nf3 e6 3.b4