Chess Opening Theory/1. e4/1...d5/2. Nf3/2...dxe4/3. Ng5/3...Nf6

Tennison gambit accepted Scandinavian defence → Tennison gambit → Tennison gambit accepted Zukertort opening → Tennison gambit → Tennison gambit accepted 3...Nf6 Black defends their pawn with their knight. Although this isn't the most accurate move (3...Bf5 is better), this is the most popular move and still playable for Black as long as they don't fall for a well-known trap. White usually plays 4. d3, forcing Black to react to the pawn being attacked again and may lead to a trap. 4. Nc3 is playable, but 4...Bg4 attacking the queen on d1 can prove quite annoying, and there are not as many traps as there are with the move 4. d3. References