411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Bc5/4. b4/4...Bxb4/5. c3/5...Ba5
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Evans Gambit Accepted: Main Line
5...Ba5
5...Ba5 is the main retreat after the Evans Gambit 5. c3, and it is considered the best attempt to "refute the gambit." However, it is not as safe as the retreat 5...Be7. Now, the most aggressive move for White is to play /6. d4/, when Black has four options:
6...exd4
6...d6
6...Nf6
6...b5