Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bb5/3...a6/4. Ba4/4...Nf6/5. O-O/5...Be7/6. Re1/6...b5/7. Bb3
|Ruy Lopez Main Line|
|Parent: Ruy Lopez|
Ruy Lopez Main Line
Black is no longer under any direct threat and may continue developing. Of the three natural moves, 7...Bb7 is considered a sideline, while the important difference between the main moves 7...d6 and 7...O-O is that the latter move allows the Marshall Gambit: 8...d5. Of course, Black still has the option of 8...d6, and since in modern times 7...d6 is almost always followed by 8...O-O anyway, whereas 7...O-O may cause White to panic at the prospect of a Marshall Gambit and play an anti-Marshall line, there seems to be no reason other than habit for 7...d6 to be preferred over 7...O-O.
Historically, 7...d6 was played to hold the e-pawn and allow 8...Na5, but this has not been a popular line since the 1930s.
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- Modern Chess Openings 15th ed, 2008. Nick de Firmian. Random House, New York. ISBN 0-8129-3682-5.
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