The Closed is a variation of the Ruy Lopez, catalogued as ECO C84. The line runs 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7, reaching the position shown below after 10 half-moves.
Both sides have pawns in the centre (White on e4, Black on e5). Development is level at two minor pieces each. It is White to move after five moves. White has castled while Black’s king is still uncommitted.
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 Closed goes 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7. It is a variation of the Ruy Lopez and is catalogued as ECO C84.
The Closed is ECO C84. 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 a6 4. Ba4 Nf6 5. O-O Be7 at +0.33 at depth 18, which is a slight pull for White, within normal opening margins. 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 e5). Development is level at two minor pieces each. It is White to move. White has castled while Black’s king is still uncommitted.