[%c_effect d3;square;d3;type;GreatFind;persistent;true] A clever way to improve the bishop's position.
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  11. e4e1  11... d5d4 Another good move, gaining space in the center.