The only virtue of 3...Nd4 is that it sets a trap that has ensnared many players. After the natural 4.Nxe5!?, Black wins with 4...Qg5! Now the obvious 5.Nxf7 loses to 5...Qxg2 6.Rf1 Qxe4+ 7.Be2 Nf3, a smothered mate. This trap is what gives the line its name; the great English master Joseph Henry Blackburne reputedly used it to win one shilling per game from café visitors. Wall has questioned this, however, stating that there are no recorded games of Blackburne with the opening.