Studying Ruy Lopez (Morphy Defense: Closed). After 6. b5 7. Bb3 (red arrows), Black castles, though the bishop is on the a2-g8, aligning with the king. I want to know if

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

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