ECO B50: Sicilian Defense

ECO B50 is part of volume B — Semi-Open Games. The Lichess chess-openings dataset files 12 named lines under it. The shortest is Sicilian Defense: Modern Variations: 1. e4 c5 2. Nf3 d6.

That position has come up in 69,616,257 Lichess games between players rated 1600 to 2500: White won 47.9%, 5.1% were drawn and Black won 47.1%.

Opening	Moves	Plies
Sicilian Defense: Modern Variations	`1. e4 c5 2. Nf3 d6`	4
Sicilian Defense	`1. e4 c5 2. Nf3 d6 3. d4`	5
Sicilian Defense: Delayed Alapin Variation, with d6	`1. e4 c5 2. Nf3 d6 3. c3`	5
Sicilian Defense: Kopec System	`1. e4 c5 2. Nf3 d6 3. Bd3`	5
Sicilian Defense: Wing Gambit, Deferred Variation	`1. e4 c5 2. Nf3 d6 3. b4`	5
Sicilian Defense	`1. e4 c5 2. Nf3 d6 3. d4 cxd4`	6
Sicilian Defense: Kotov Gambit	`1. e4 c5 2. Nf3 d6 3. g3 b5`	6
Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order	`1. e4 c5 2. Nf3 d6 3. d4 Nf6`	6
Sicilian Defense: Modern Variations, Tartakower	`1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. c3`	7
Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order Accepted	`1. e4 c5 2. Nf3 d6 3. d4 Nf6 4. dxc5 Nxe4`	8
Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Gambit	`1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 Nxe4`	12
Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Double Gambit	`1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 Nxe4 7. d5 Qa5+ 8. Nc3 Nxc3 9. bxc3`	17