The Berlin Defense, Nyholm Attack is a variation of the Ruy Lopez, catalogued as ECO C65. The line runs 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d4 exd4 5. O-O, reaching the position shown below after 9 half-moves.
Both sides have pawns in the centre (White on e4, Black on d4). Development is level at two minor pieces each, and Black is up a pawn of material. It is Black to move after five moves. White has castled while Black’s king is still uncommitted; Black has doubled pawns on the d-file.
On the Ruy Lopez generally: One of the oldest and most classical openings. White develops rapidly and puts pressure on Black's center.
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The Berlin Defense, Nyholm Attack goes 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d4 exd4 5. O-O. It is a variation of the Ruy Lopez and is catalogued as ECO C65.
The Berlin Defense, Nyholm Attack is ECO C65. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Ruy Lopez.
Stockfish evaluates the position after 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d4 exd4 5. O-O at -0.03 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.
Both sides have pawns in the centre (White on e4, Black on d4). Development is level at two minor pieces each, and Black is up a pawn of material. It is Black to move. White has castled while Black’s king is still uncommitted; Black has doubled pawns on the d-file.