1. g1f3  1... g8f6  2. c2c4  2... e7e6  3. d2d4  3... d7d5  4. b1c3  4... f8b4  5. c4d5  5... e6d5  6. c1f4 A relatively rare choice for the first player. 6... f6e4  7. a1c1  7... c7c6  8. e2e3  8... b8d7  9. f1d3  9... d7f6 All of this seems very logical and now a strange version of the Carlsbad arose. It seems favorable for White, as it is not easy to challenge the white dark-squared bishop which is a common theme in the usual Carlsbad.