A variation that is in vogue and in which White has not yet been able to prove an advantage, despite the dangers for Black and the need to remember many lines.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... a7a6  4. b5a4  4... g8f6  5. e1g1  5... f6e4 The Open Ruy Lopez is one of the most reliable possibilities for Black and has been used by several super GMs. 6. d2d4  6... b7b5  7. a4b3  7... d7d5  8. d4e5  8... c8e6  9. b1d2  9... f8e7  10. c2c3 