The Wormald Attack, Grünfeld Variation is a variation of the Ruy Lopez, catalogued as ECO C77. The line runs 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. d4 d6 8. c3 Bg4, reaching the position shown below after 16 half-moves.
Both sides have pawns in the centre (White on d4 and e4, Black on e5), and one pawn capture is available, so the structure has not settled yet. Black is ahead in development, with four minor pieces out to White's two. It is White to move after eight moves.
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 Wormald Attack, Grünfeld Variation goes 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. d4 d6 8. c3 Bg4. It is a variation of the Ruy Lopez and is catalogued as ECO C77.
The Wormald Attack, Grünfeld Variation is ECO C77. 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. Qe2 b5 6. Bb3 Be7 7. d4 d6 8. c3 Bg4 at -0.04 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 d4 and e4, Black on e5), and one pawn capture is available, so the structure has not settled yet. Black is ahead in development, with four minor pieces out to White's two. It is White to move.