ECO B00
77 named openings and variations are classified as B00. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Barnes DefenseB001. e4 f6
- Borg DefenseB001. e4 g5
- Borg Defense: Troon GambitB001. e4 g5 2. d4 h6 3. h4 g4
- Borg Defense: Zilbermints GambitB001. e4 g5 2. d4 e5
- Carr DefenseB001. e4 h6
- Carr Defense: Zilbermints GambitB001. e4 h6 2. d4 e5
- Duras GambitB001. e4 f5
- Fried Fox DefenseB001. e4 f6 2. d4 Kf7
- Goldsmith DefenseB001. e4 h5
- Goldsmith Defense: Picklepuss DefenseB001. e4 h5 2. d4 Nf6
- Hippopotamus DefenseB001. e4 Nh6
- King's Pawn GameB001. e4
- Lemming DefenseB001. e4 Na6
- Lion Defense: Lion's JawB001. e4 d6 2. d4 Nf6 3. f3
- Nimzowitsch DefenseB001. e4 Nc6
- Nimzowitsch Defense: Breyer VariationB001. e4 Nc6 2. Nc3 Nf6 3. d4 e5
- Nimzowitsch Defense: Colorado CountergambitB001. e4 Nc6 2. Nf3 f5
- Nimzowitsch Defense: Colorado Countergambit AcceptedB001. e4 Nc6 2. Nf3 f5 3. exf5
- Nimzowitsch Defense: Declined VariationB001. e4 Nc6 2. Nf3
- Nimzowitsch Defense: El Columpio DefenseB001. e4 Nc6 2. Nf3 Nf6 3. e5 Ng4
- Nimzowitsch Defense: El Columpio Defense, El Columpio GambitB001. e4 Nc6 2. Nf3 Nf6 3. e5 Ng4 4. d4 d6 5. h3 Nh6 6. e6
- Nimzowitsch Defense: El Columpio Defense, Exchange VariationB001. e4 Nc6 2. Nf3 Nf6 3. e5 Ng4 4. d4 d6 5. h3 Nh6 6. exd6
- Nimzowitsch Defense: El Columpio Defense, Pin VariationB001. e4 Nc6 2. Nf3 Nf6 3. e5 Ng4 4. d4 d6 5. h3 Nh6 6. Bb5
- Nimzowitsch Defense: Franco-Nimzowitsch VariationB001. e4 Nc6 2. Nf3 e6
- Nimzowitsch Defense: French ConnectionB001. e4 Nc6 2. Nc3 e6
- Nimzowitsch Defense: Hornung GambitB001. e4 Nc6 2. d4 d5 3. Be3
- Nimzowitsch Defense: Kennedy VariationB001. e4 Nc6 2. d4 e5
- Nimzowitsch Defense: Kennedy Variation, Bielefelder GambitB001. e4 Nc6 2. d4 e5 3. dxe5 Bc5
- Nimzowitsch Defense: Kennedy Variation, Hammer GambitB001. e4 Nc6 2. d4 e5 3. dxe5 f6
- Nimzowitsch Defense: Kennedy Variation, Herford GambitB001. e4 Nc6 2. d4 e5 3. dxe5 Qh4
- Nimzowitsch Defense: Kennedy Variation, Keres AttackB001. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. Nc3
- Nimzowitsch Defense: Kennedy Variation, Linksspringer VariationB001. e4 Nc6 2. d4 e5 3. d5
- Nimzowitsch Defense: Kennedy Variation, Main LineB001. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. f4 Ng6
- Nimzowitsch Defense: Kennedy Variation, Paulsen AttackB001. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. Nf3
- Nimzowitsch Defense: Kennedy Variation, Riemann DefenseB001. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. f4 Nc6
- Nimzowitsch Defense: Kennedy Variation, de Smet GambitB001. e4 Nc6 2. d4 e5 3. dxe5 d6
- Nimzowitsch Defense: Mikenas VariationB001. e4 Nc6 2. d4 d6
- Nimzowitsch Defense: Neo-Mongoloid DefenseB001. e4 Nc6 2. d4 f6
- Nimzowitsch Defense: Pirc ConnectionB001. e4 Nc6 2. Nc3 g6
- Nimzowitsch Defense: Pseudo-Spanish VariationB001. e4 Nc6 2. Bb5
- Nimzowitsch Defense: Scandinavian VariationB001. e4 Nc6 2. d4 d5
- Nimzowitsch Defense: Scandinavian Variation, Aachen GambitB001. e4 Nc6 2. d4 d5 3. exd5 Nb4
- Nimzowitsch Defense: Scandinavian Variation, Advance VariationB001. e4 Nc6 2. d4 d5 3. e5
- Nimzowitsch Defense: Scandinavian Variation, Bogoljubow VariationB001. e4 Nc6 2. d4 d5 3. Nc3
- Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Brandics GambitB001. e4 Nc6 2. d4 d5 3. Nc3 a6
- Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Erben GambitB001. e4 Nc6 2. d4 d5 3. Nc3 g6
- Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Heinola-Deppe GambitB001. e4 Nc6 2. d4 d5 3. Nc3 e5
- Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Nimzowitsch GambitB001. e4 Nc6 2. d4 d5 3. Nc3 dxe4 4. d5 Ne5
- Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Richter GambitB001. e4 Nc6 2. d4 d5 3. Nc3 dxe4 4. d5 Nb8 5. f3
- Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Vehre VariationB001. e4 Nc6 2. d4 d5 3. Nc3 Nf6
- Nimzowitsch Defense: Scandinavian Variation, Exchange VariationB001. e4 Nc6 2. d4 d5 3. exd5 Qxd5
- Nimzowitsch Defense: Scandinavian Variation, Exchange Variation, Marshall GambitB001. e4 Nc6 2. d4 d5 3. exd5 Qxd5 4. Nc3
- Nimzowitsch Defense: Wheeler GambitB001. e4 Nc6 2. b4
- Nimzowitsch Defense: Williams VariationB001. e4 Nc6 2. Nf3 d6
- Nimzowitsch Defense: Woodchuck VariationB001. e4 Nc6 2. d4 a6
- Owen DefenseB001. e4 b6
- Owen Defense: Guatemala DefenseB001. e4 b6 2. d4 Ba6
- Owen Defense: Hekili-Loa GambitB001. e4 b6 2. d4 c5 3. dxc5 Nc6
- Owen Defense: Matovinsky GambitB001. e4 b6 2. d4 Bb7 3. Bd3 f5 4. exf5 Bxg2 5. Qh5+ g6
- Owen Defense: Naselwaus GambitB001. e4 b6 2. d4 Bb7 3. Bg5
- Owen Defense: Smith GambitB001. e4 b6 2. d4 Bb7 3. Nf3
- Owen Defense: Unicorn VariationB001. e4 f6 2. d4 b6 3. c4 Bb7
- Owen Defense: Wind GambitB001. e4 b6 2. d4 Bb7 3. f3 e5
- Pirc DefenseB001. e4 d6
- Pirc Defense: Roscher GambitB001. e4 d6 2. d4 Nf6 3. Nf3
- Rat Defense: Antal DefenseB001. e4 d6 2. d4 Nd7
- Rat Defense: Fuller GambitB001. e4 d6 2. f4 d5 3. exd5 Nf6
- Rat Defense: HarmonistB001. e4 d6 2. f4
- Rat Defense: Petruccioli AttackB001. e4 d6 2. h4
- Rat Defense: Spike AttackB001. e4 d6 2. g4
- St. George DefenseB001. e4 a6
- St. George Defense: Polish VariationB001. e4 a6 2. d4 b5 3. Nf3 Bb7 4. Bd3 e6
- St. George Defense: San Jorge VariationB001. e4 a6 2. d4 b5 3. Nf3 Bb7 4. Bd3 d6 5. O-O g6 6. c3 Bg7
- St. George Defense: Zilbermints GambitB001. e4 a6 2. d4 e5
- Van Geet Opening: Berlin GambitB001. e4 Nc6 2. d4 d5 3. Nc3 dxe4 4. d5
- Ware DefenseB001. e4 a5
- Ware Defense: Snagglepuss DefenseB001. e4 a5 2. d4 Nc6