Morphy Defence, Closed Defence

The most common reply to Ruy Lopez opening is move "a6" for black which is called Morphy's defence. After Morphy's defence is played there are many variation

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Ruy Lopez - Chess Openings

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The Ruy Lopez Opening

In the Ruy Lopez opening, are 4. Ba4 and 4. Bxc6 the only viable moves for the bishop after 3. … a6? - Quora

The Ruy Lopez Opening

What are the different types of chess openings? - Quora

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