Chess Opening Theory/1. e4/1...e5/2. Nf3/2...c6/3. Nxe5/3...Nf6/4. d3/4...Qa5/5. Nc3/5...Qxe5/6. Be2/6...Bb4

= King's Knight Opening: Gunderam Gambit, Bishop Attack =

6...Bb4
This is very good for black as it pins the knight and threatens to exchange it to ruin white's pawn structure.

White now has:


 * /7. Bd2/ Unpin Variation


 * /7. O-O/ Main Line

The Main Line (7. O-O) is better as it unpins the knight and moves the king to safety.