Chess Opening Theory/1. e4/1...e5/2. Nf3/2...c6/3. Nxe5/3...Nf6/4. d3/4...Qa5

This move wins as it forks white's pieces. /5. Nc3/

5 popular responses after black captures the knight are:


 * 6. f4
 * 6. Be2 Bishop Attack
 * 6. g3
 * 6. d4
 * 6. Be3