Recently I have been playing the Evans Gambit as many times as I can and for the most part, black plays
4...Bxb4, but someone played
4...Nxb4 and I wasn't sure how to continue. After the following moves below, how should I continue with the
Evans Gambit as white?
[FEN ""] 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Nxb4 5. c3 Nc6 6. d4 exd4