411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...d5/2. exd5/2...Qxd5/3. Nc3/3...Qa5/4. b4/4...Qxb4
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Scandinavian Defense, Leonhardt Gambit
The Black queen greedily takes the pawn, accepting White's challenge. White now has an open b-file, so she continues with 5. Rb1.
5. Nb5?! has been tried by some mavericks, setting up some deadly traps.