ECO C68
6 named openings and variations are classified as C68. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Ruy Lopez: Exchange VariationC681. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6
- Ruy Lopez: Exchange Variation, Alekhine VariationC681. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4 Bd6
- Ruy Lopez: Exchange Variation, Keres VariationC681. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3
- Ruy Lopez: Exchange Variation, Lutikov VariationC681. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 bxc6
- Ruy Lopez: Exchange Variation, Romanovsky VariationC681. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3 f6 6. d3
- Ruy Lopez: Exchange, Alekhine VariationC681. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4 Bd7