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

Gunderam Gambit Accepted
	a b c d e f g h 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 a b c d e f g h
	Position in Forsyth-Edwards Notation (FEN) rnb1kb1r/pp1p1ppp/2p2n2/q3N3/4P3/3P4/PPP2PPP/RNBQKB1R w
	Moves: 1. e4 e5 2. Nf3 c6 3. Nxe5 Nf6 4. d3 Qa5+

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

5 popular responses after black captures the knight are:

Gunderam Gambit Accepted
a b c d e f g h 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 a b c d e f g h
Position in Forsyth-Edwards Notation (FEN) rnb1kb1r/pp1p1ppp/2p2n2/q3N3/4P3/3P4/PPP2PPP/RNBQKB1R w
Moves: 1. e4 e5 2. Nf3 c6 3. Nxe5 Nf6 4. d3 Qa5+