The Two Knights Defense is a variation of the Italian Game, catalogued as ECO C55. The line runs 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3 Nxe4 5. Nxe4 d5, reaching the position shown below after 10 half-moves.
Black holds the centre with pawns on d5 and e5. Development is level at three minor pieces each, and White is up two points of material. It is White to move after five moves.
On the Italian Game generally: A classical opening focusing on rapid development and control of the center with pieces.
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The Two Knights Defense goes 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3 Nxe4 5. Nxe4 d5. It is a variation of the Italian Game and is catalogued as ECO C55.
The Two Knights Defense is ECO C55. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Italian Game.
Stockfish evaluates the position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3 Nxe4 5. Nxe4 d5 at -0.18 at depth 18, which is balanced. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
Black holds the centre with pawns on d5 and e5. Development is level at three minor pieces each, and White is up two points of material. It is White to move.