1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6 In a world championship match, the Berlin is always to be expected. Nowadays it's considered the most solid and reliable way to meet the Ruy Lopez. 4. e1g1  4... f6e4  5. f1e1  5... e4d6  6. f3e5  6... f8e7  7. b5f1 