ChessAlgo Opening Library

Semi-Open Games

ChessAlgo opening guides for the Semi-Open Games family — move order, learning level, and direct opening links.

All Openings A Flank Openings B Semi-Open Games C Open Games D Closed & Semi-Closed Games E Indian Defenses
ECO B20 Array Sicilian Defense Semi-Open Games Moves: 1. e4 c5 2 moves Open guide → ECO B22 Array Sicilian Defense: Alapin Variation Semi-Open Games Moves: 1. e4 c5 2. c3 3 moves Open guide → ECO B23 Array Sicilian Defense: Closed Variation Semi-Open Games Moves: 1. e4 c5 2. Nc3 3 moves Open guide → ECO B21 Array Sicilian: Grand Prix Attack Semi-Open Games Moves: 1. e4 c5 2. Nc3 Nc6 3. f4 5 moves Open guide → ECO B70 Array Sicilian: Dragon Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 10 moves Open guide → ECO B90 Array Sicilian: Najdorf Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 10 moves Open guide → ECO B80 Array Sicilian: Scheveningen Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 10 moves Open guide → ECO B96 Array Sicilian: Najdorf, Poisoned Pawn Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 14 moves Open guide → ECO B10 Array Caro-Kann Defense Semi-Open Games Moves: 1. e4 c6 2 moves Open guide → ECO B12 Array Caro-Kann: Advance Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. e5 5 moves Open guide → ECO B13 Array Caro-Kann: Exchange Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. exd5 cxd5 6 moves Open guide → ECO B17 Array Caro-Kann: Steinitz Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 8 moves Open guide → ECO B01 Array Scandinavian Defense Semi-Open Games Moves: 1. e4 d5 2 moves Open guide → ECO B06 Array Modern Defense Semi-Open Games Moves: 1. e4 g6 2 moves Open guide → ECO B07 Array Pirc Defense Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 6 moves Open guide → ECO B09 Array Pirc Defense: Austrian Attack Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 7 moves Open guide → ECO B00 Array Nimzowitsch Defense Semi-Open Games Moves: 1. e4 Nc6 2 moves Open guide → ECO B32 Array Sicilian: Löwenthal Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 8 moves Open guide → ECO B02 Array Alekhine Defense Semi-Open Games Moves: 1. e4 Nf6 2 moves Open guide → ECO B04 Array Alekhine Defense: Modern Variation Semi-Open Games Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 7 moves Open guide → ECO B03 Array Alekhine Defense: Four Pawns Attack Semi-Open Games Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 9 moves Open guide → ECO B03 Array Alekhine Defense: Exchange Variation Semi-Open Games Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 9 moves Open guide → ECO B21 Array Sicilian Defense: Smith-Morra Gambit Semi-Open Games Moves: 1. e4 c5 2. d4 cxd4 3. c3 5 moves Open guide → ECO B45 Array Sicilian Defense: Four Knights Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 10 moves Open guide → ECO B30 Array Sicilian Defense: Old Sicilian Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nc6 4 moves Open guide → ECO B18 Array Caro-Kann Defense: Classical Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 8 moves Open guide → ECO B10 Array Caro-Kann Defense: Two Knights Attack Semi-Open Games Moves: 1. e4 c6 2. Nc3 d5 3. Nf3 5 moves Open guide → ECO B08 Array Pirc Defense: Classical Variation Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 7 moves Open guide → ECO B07 Array Pirc Defense: Byrne Variation Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 7 moves Open guide → ECO B01 Array Scandinavian Defense: Mieses-Kotroc Variation Semi-Open Games Moves: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 6 moves Open guide → ECO B01 Array Scandinavian Defense: Modern Variation Semi-Open Games Moves: 1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 6 moves Open guide → ECO B97 Array Sicilian: Najdorf, English Attack Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 11 moves Open guide → ECO B85 Array Sicilian: Scheveningen, Classical Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 11 moves Open guide → ECO B76 Array Sicilian: Dragon, Yugoslav Attack Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 15 moves Open guide → ECO B72 Array Sicilian: Dragon, Classical Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 11 moves Open guide → ECO B00 Array Owen Defense Semi-Open Games Moves: 1. e4 b6 2 moves Open guide → ECO B15 Array Caro-Kann: Forgacs Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 8 moves Open guide → ECO B16 Array Caro-Kann: Bronstein-Larsen Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 10 moves Open guide → ECO B14 Array Caro-Kann: Panov-Botvinnik Attack Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 9 moves Open guide → ECO B41 Array Sicilian Defense: Kan Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 8 moves Open guide → ECO B46 Array Sicilian Defense: Taimanov Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 10 moves Open guide → ECO B32 Array Sicilian Defense: Accelerated Dragon Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 8 moves Open guide → ECO B59 Array Sicilian Defense: Boleslavsky Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 13 moves Open guide → ECO B58 Array Sicilian Defense: Classical Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 11 moves Open guide → ECO B60 Array Sicilian Defense: Richter-Rauzer Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 11 moves Open guide → ECO B33 Array Sicilian Defense: Sveshnikov Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 10 moves Open guide → ECO B81 Array Sicilian Defense: Scheveningen, Keres Attack Semi-Open Games Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4 11 moves Open guide → ECO B29 Array Sicilian Defense: Nimzowitsch Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nf6 4 moves Open guide → ECO B28 Array Sicilian Defense: O'Kelly Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 a6 4 moves Open guide → ECO B20 Array Sicilian Defense: Wing Gambit Semi-Open Games Moves: 1. e4 c5 2. b4 3 moves Open guide → ECO B27 Array Sicilian Defense: Hyperaccelerated Dragon Semi-Open Games Moves: 1. e4 c5 2. Nf3 g6 3. d4 5 moves Open guide → ECO B53 Array Sicilian Defense: Chekhover Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 7 moves Open guide → ECO B54 Array Sicilian Defense: Prins Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 9 moves Open guide → ECO B17 Array Caro-Kann Defense: Karpov Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 8 moves Open guide → ECO B15 Array Caro-Kann Defense: Gurgenidze System Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nc3 g6 6 moves Open guide → ECO B15 Array Caro-Kann Defense: Tartakower Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 10 moves Open guide → ECO B10 Array Caro-Kann Defense: Breyer Variation Semi-Open Games Moves: 1. e4 c6 2. d3 3 moves Open guide → ECO B12 Array Caro-Kann Defense: Modern Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nd2 5 moves Open guide → ECO B15 Array Caro-Kann Defense: Main Line Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 7 moves Open guide → ECO B07 Array Pirc Defense: 150 Attack Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. Qd2 9 moves Open guide → ECO B07 Array Pirc Defense: Kholmov System Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bc4 7 moves Open guide → ECO B07 Array Pirc Defense: Czech Defense Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 c6 6 moves Open guide → ECO B06 Array Modern Defense: Standard Line Semi-Open Games Moves: 1. e4 g6 2. d4 Bg7 3. Nc3 5 moves Open guide → ECO B06 Array Modern Defense: Two Knights Variation Semi-Open Games Moves: 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3 7 moves Open guide → ECO B07 Array Modern Defense: Geller's System Semi-Open Games Moves: 1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c3 7 moves Open guide → ECO B01 Array Scandinavian Defense: Icelandic-Palme Gambit Semi-Open Games Moves: 1. e4 d5 2. exd5 Nf6 3. c4 e6 6 moves Open guide → ECO B01 Array Scandinavian Defense: Qd6 Variation Semi-Open Games Moves: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 6 moves Open guide → ECO B03 Array Alekhine Defense: Balogh Variation Semi-Open Games Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Bc4 7 moves Open guide → ECO B02 Array Alekhine Defense: Spielmann Gambit Semi-Open Games Moves: 1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. e6 7 moves Open guide → ECO B02 Array Alekhine Defense: Brooklyn Variation Semi-Open Games Moves: 1. e4 Nf6 2. e5 Ng8 4 moves Open guide →