ECO B27
21 named openings and variations are classified as B27. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Modern Defense: Pterodactyl VariationB271. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5
- Pterodactyl Defense: Sicilian, AnhangueraB271. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Be3
- Pterodactyl Defense: Sicilian, Benoni GambitB271. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. d5
- Pterodactyl Defense: Sicilian, PteranodonB271. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3
- Pterodactyl Defense: Sicilian, RhamphorhynchusB271. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3
- Pterodactyl Defense: Sicilian, UnpinB271. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Bd2
- Pterodactyl Defense: Western, PterodactylB271. e4 c5 2. Nf3 g6 3. c3 Bg7 4. d4 Qa5
- Pterodactyl Defense: Western, RhamphorhynchusB271. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+
- Sicilian Defense: Acton ExtensionB271. e4 c5 2. Nf3 g6 3. c4 Bh6
- Sicilian Defense: Brussels GambitB271. e4 c5 2. Nf3 f5
- Sicilian Defense: Bücker VariationB271. e4 c5 2. Nf3 h6
- Sicilian Defense: Double-Dutch GambitB271. e4 c5 2. Nf3 f5 3. exf5 Nh6
- Sicilian Defense: Frederico VariationB271. e4 c5 2. Nf3 g6 3. d4 f5
- Sicilian Defense: Hyperaccelerated DragonB271. e4 c5 2. Nf3 g6
- Sicilian Defense: Hyperaccelerated PterodactylB271. e4 c5 2. Nf3 g6 3. d4 Bg7
- Sicilian Defense: Hyperaccelerated Pterodactyl, Exchange VariationB271. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3 Qxc3+
- Sicilian Defense: Jalalabad VariationB271. e4 c5 2. Nf3 e5
- Sicilian Defense: Katalimov VariationB271. e4 c5 2. Nf3 b6
- Sicilian Defense: Mongoose VariationB271. e4 c5 2. Nf3 Qa5
- Sicilian Defense: Polish GambitB271. e4 c5 2. Nf3 b5
- Sicilian Defense: Quinteros VariationB271. e4 c5 2. Nf3 Qc7