ECO E12
18 named openings and variations are classified as E12. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Queen's Indian DefenseE121. d4 Nf6 2. c4 e6 3. Nf3 b6
- Queen's Indian Defense: Kasparov VariationE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3
- Queen's Indian Defense: Kasparov Variation, Botvinnik AttackE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 h6 6. Bh4 g5 7. Bg3 Nh5
- Queen's Indian Defense: Kasparov-Petrosian VariationE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3
- Queen's Indian Defense: Kasparov-Petrosian Variation, Andersson VariationE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 Ne4
- Queen's Indian Defense: Kasparov-Petrosian Variation, Classical VariationE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 exd5
- Queen's Indian Defense: Kasparov-Petrosian Variation, Hedgehog VariationE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 g6
- Queen's Indian Defense: Kasparov-Petrosian Variation, Kasparov AttackE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qc2
- Queen's Indian Defense: Kasparov-Petrosian Variation, Main LineE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5
- Queen's Indian Defense: Kasparov-Petrosian Variation, Marco DefenseE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 Be7
- Queen's Indian Defense: Kasparov-Petrosian Variation, Modern VariationE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5
- Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian AttackE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. e3
- Queen's Indian Defense: Kasparov-Petrosian Variation, Polovodin GambitE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. a3 d5 6. cxd5 Nxd5 7. e4
- Queen's Indian Defense: Kasparov-Petrosian Variation, Rashkovsky AttackE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qa4+
- Queen's Indian Defense: Kasparov-Petrosian Variation, Romanishin AttackE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Bd2
- Queen's Indian Defense: Miles VariationE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Bf4
- Queen's Indian Defense: Petrosian VariationE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3
- Queen's Indian Defense: Petrosian Variation, Farago DefenseE121. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Ba6 5. Qc2 Bb7