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...Bb4/7. O-O

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

7. O-O
/7...Bxc3/ .