King's Knight Opening
ECO C40 · 1. e4 e5 2. Nf3
The King's Knight Opening, 1.e4 e5 2.Nf3, is the gateway to most classical open games: the Italian, Ruy Lopez, Scotch, Petrov and Philidor all start here. It is the most natural second move, attacking the e5 pawn and developing a piece toward the center.
Plans for White
White attacks e5 and prepares Bc4, Bb5 or d4. The knight on f3 also helps castle quickly and supports a later d4 push to open the center.
Plans for Black
Black's main answers are 2...Nc6, defending e5 while developing; 2...Nf6, counterattacking in Petrov style; and 2...d6, Philidor's solid pawn defense. Gambits such as 2...d5 (Elephant) and 2...f5 (Latvian) are rarer.
Typical pawn structures
A classical e4/e5 center; the third move decides whether play becomes open (d4 lines) or closed and maneuvering (d3 lines).
Who it suits
Everyone: it is the most common way to play the open games, and the ideal place for beginners to learn opening principles.
Common traps
Moves that ignore e5, such as 2...Qf6 or 2...Bc5, can let White win time or the pawn. The Damiano Defense 2...f6? is refuted by 3.Nxe5!, exposing Black's king.
Variations
- King's Knight Opening: Normal Variation — 1. e4 e5 2. Nf3 Nc6
- King's Knight Opening: Konstantinopolsky — 1. e4 e5 2. Nf3 Nc6 3. g3