411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. Ng5/4...d5/5. exd5/5...Na5/6. Bb5/6...c6/7. dxc6/7...bxc6/8. Qf3/8...cxb5/9. Qxa8/9...Qc7
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9...Qc7
Defends the a7-pawn and prepares Nc6. If White isn't careful and doesn't play 10.Qf3!, there may be ideas to trap the queen on a8.