The Tennison Gambit, also known as the Lemberg or Zukertort Gambit, arises after 1.Nf3 d5 2.e4. ECO code: A06.

History

The gambit is named after Otto Tennison, a Danish-American player who employed it in the late 19th century. It also bears the names of the cities and players associated with its analysis.

Main Lines

After 2...dxe4, White plays 3.Ng5, attacking the e4-pawn and threatening Bc4 with pressure on f7. Black can defend with 3...Nf6, 3...Bf5, or 3...e5. The gambit leads to sharp tactical positions, but with best play, Black should emerge with a slight advantage after consolidating the extra pawn.

Strategic Themes & Plans

White sacrifices a pawn for rapid piece development and attacking chances, particularly targeting the f7-square. The gambit is not considered fully sound at the highest levels but offers practical chances, especially against unprepared opponents. It is seldom encountered in serious master play.