1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6  4. e1g1  4... f6e4  5. f1e1  5... e4d6  6. a2a4 Carlsen has many small weapons he successfully employs to create practical problems against the solid Berlin Defense. 6... f8e7  7. b1c3  7... a7a6  8. b5f1  8... e5e4 [%c_effect e4;square;e4;type;GreatFind;persistent;true] Considered by opening theory the best way to equalize. 9. c3e4  9... d6e4  10. e1e4  10... d7d5 