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Chess Opening Database

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Example Searches: Queens gambit, B33, d4 d5

> ECO Openings Starting With This Line: 1

Four knights diagram

Four knights (C49)

Nimzovich (Paulsen) variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. Bxc6