After 1.e4 e5, the position is the classic Open Game, where both sides commit a central pawn and the resulting middlegames often feature open lines and tactical play. The Ruy Lopez (Spanish) arises after 1.e4 e5 2.Nf3 Nc6 3.Bb5 and is one of the deepest and most heavily theoretical openings in chess, while the Italian Game (3.Bc4) emphasizes aggressive piece development toward the kingside. The Scotch Game (3.d4) immediately opens the center, leading to rapid piece activity for both sides. The Vienna Game (1.e4 e5 2.Nc3) offers White a flexible attacking setup that can transpose into many lines.
Gambits thrive in the Open Games, where a pawn or two are sacrificed for swift development and attacking chances. The King's Gambit (1.e4 e5 2.f4) is a romantic and aggressive try that remains risky in modern play, while the Evans Gambit is a sharp Italian variation featuring the early b4 thrust, and the Danish Gambit (1.e4 e5 2.d4 exd4 3.c3) goes further by sacrificing multiple pawns for development. The Latvian Gambit (2.Nf3 f5) is one of the sharpest and most double-edged tries available to Black.
Black also has quieter ways of meeting 1.e4 e5. The Petroff Defense (1.e4 e5 2.Nf3 Nf6) leads to symmetrical play and has a drawish reputation, while the Philidor Defense (2.Nf3 d6) is solid but considered passive. Within the Ruy Lopez itself, the Exchange Variation (4.Bxc6) simplifies by trading bishops early, the Open Spanish sees Black play ...Nxe4 quickly to grab a pawn, the Marshall Attack is a sharp sideline beginning with ...d5, and the Berlin Defense (with ...Nf6) earned the nickname "Berlin Wall" for its stony solidity after Vladimir Kramnik used it to dethrone Garry Kasparov in 2000.