├── E06 - 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Be7 5. Bg2 O-O 6. Nc3 dxc4 - Catalan Opening: Closed (7)
└── E06 - 1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. c4 Be7 5. d4 O-O 6. Nc3 Nbd7 - Catalan Opening: Closed (7)