context: 1. e2e4  1... c7c5  2. g1f3  2... e7e6  3. d2d4  3... c5d4  4. f3d4  4... b8c6  5. b1c3  5... d8c7 It amazes me how Carlsen can play several different variations of the Sicilian as Black, all with equal skill.